It seems that the beginning of God's creation started with His Heavenly Family. These are Spirit beings, like and lesser than Himself.  They occupy a dimension that human beings do not normally perceive.

These are called God's Sons or sons of God.  They are sometimes called angels which means messengers. Sometimes they are referred to as watchers or living creatures. They are also referred to as stars in the heavens.  

Sometimes when they appear on Earth they appear like men and they are referred to as men.   Usually something happens that reveals that they are indeed "super-men".   sometimes  people think that they are God and will fall down to worship them.    If they are indeed Holy beings  they will always refuse to be worshiped.  These loyal sons of God are identified as as elect angels.

God is THE original, eternal, sovereign, self-existent Spirit.

He created other Spirit beings, some of which are referred to as "gods", but He is the separate, distinct, Almighty God of All of them. He is the GOD of gods. This is why he is referred to as the Most High God.

Psa. 47:1-2

[1] O clap your hands, all ye people; shout unto God with the voice of triumph.
[2] For the LORD most high is terrible; he is a great King over all the earth.

Psa. 91:1-2

[1] He that dwelleth in the secret place of the most High shall abide under the shadow of the Almighty.
[2] I will say of the LORD, He is my refuge and my fortress: my God; in him will I trust.

Psa. 57:2

[2] I will cry unto God most high; unto God that performeth all things for me.

Deut. 32:8

When the most High divided to the nations their inheritance, when he separated the sons of Adam, he set the bounds of the people according to the number of the children of Israel.

Psa. 82:1-8

[1] God standeth in the congregation of the mighty; he judgeth among the gods.
[2] How long will ye judge unjustly, and accept the persons of the wicked? Selah.
[3] Defend the poor and fatherless: do justice to the afflicted and needy.
[4] Deliver the poor and needy: rid them out of the hand of the wicked.
[5] They know not, neither will they understand; they walk on in darkness: all the foundations of the earth are out of course.
[6] I have said, Ye are gods; and all of you are children of the most High.
[7] But ye shall die like men, and fall like one of the princes.
[8] Arise, O God, judge the earth: for thou shalt inherit all nations.

God is a Spirit.

His manifest personal presence is in the spiritual Realm which we cannot ordinarily perceive in our human existence.

Acts 17:24-29

[24] God that made the world and all things therein, seeing that he is Lord of heaven and earth, dwelleth not in temples made with hands;
[25] Neither is worshipped with men's hands, as though he needed any thing, seeing he giveth to all life, and breath, and all things;
[26] And hath made of one blood all nations of men for to dwell on all the face of the earth, and hath determined the times before appointed, and the bounds of their habitation;
[27] That they should seek the Lord, if haply they might feel after him, and find him, though he be not far from every one of us:
[28] For in him we live, and move, and have our being; as certain also of your own poets have said, For we are also his offspring.
[29] Forasmuch then as we are the offspring of God, we ought not to think that the Godhead is like unto gold, or silver, or stone, graven by art and man's device.

John 4:21-24

[21] Jesus saith unto her, Woman, believe me, the hour cometh, when ye shall neither in this mountain, nor yet at Jerusalem, worship the Father.
[22] Ye worship ye know not what: we know what we worship: for salvation is of the Jews.
[23] But the hour cometh, and now is, when the true worshippers shall worship the Father in spirit and in truth: for the Father seeketh such to worship him.
[24] God is a Spirit: and they that worship him must worship him in spirit and in truth.

Since God is a Spirit, it makes sense that He would create Spirit beings for his family. They would need to be Spirit beings in order to interact with Him.   It wouldn't be much of a family if they were isolated from Him because they were too different from Him.

Living Creatures

Rev. 4:6-9

[6] And before the throne there was a sea of glass like unto crystal: and in the midst of the throne, and round about the throne, were four beasts full of eyes before and behind.
[7] And the first beast was like a lion, and the second beast like a calf, and the third beast had a face as a man, and the fourth beast was like a flying eagle.
[8] And the four beasts had each of them six wings about him; and they were full of eyes within: and they rest not day and night, saying, Holy, holy, holy, Lord God Almighty, which was, and is, and is to come.
[9] And when those beasts give glory and honour and thanks to him that sat on the throne, who liveth for ever and ever,

Watchers

Dan. 4:13-17

[13] I saw in the visions of my head upon my bed, and, behold, a watcher and an holy one came down from heaven;
[14] He cried aloud, and said thus, Hew down the tree, and cut off his branches, shake off his leaves, and scatter his fruit: let the beasts get away from under it, and the fowls from his branches:
[15] Nevertheless leave the stump of his roots in the earth, even with a band of iron and brass, in the tender grass of the field; and let it be wet with the dew of heaven, and let his portion be with the beasts in the grass of the earth:
[16] Let his heart be changed from man's, and let a beast's heart be given unto him; and let seven times pass over him.
[17] This matter is by the decree of the watchers, and the demand by the word of the holy ones: to the intent that the living may know that the most High ruleth in the kingdom of men, and giveth it to whomsoever he will, and setteth up over it the basest of men.

Angels, Sons of God

Job 38:1-7

[1] Then the LORD answered Job out of the whirlwind, and said,
[2] Who is this that darkeneth counsel by words without knowledge?
[3] Gird up now thy loins like a man; for I will demand of thee, and answer thou me.
[4] Where wast thou when I laid the foundations of the earth? declare, if thou hast understanding.
[5] Who hath laid the measures thereof, if thou knowest? or who hath stretched the line upon it?
[6] Whereupon are the foundations thereof fastened? or who laid the corner stone thereof;
[7] When the morning stars sang together, and all the sons of God shouted for joy?

Psa. 148:1-5

[1] Praise ye the LORD. Praise ye the LORD from the heavens: praise him in the heights.
[2] Praise ye him, all his angels: praise ye him, all his hosts.
[3] Praise ye him, sun and moon: praise him, all ye stars of light.
[4] Praise him, ye heavens of heavens, and ye waters that be above the heavens.
[5] Let them praise the name of the LORD: for he commanded, and they were created.

1 Tim. 5:21

[21] I charge thee before God, and the Lord Jesus Christ, and the elect angels, that thou observe these things without preferring one before another, doing nothing by partiality.

God created mankind and Mankind rebelled against Him but before that, Angels had rebelled against Him.

 2 Pet. 2:4

[4] For if God spared not the angels that sinned, but cast them down to hell, and delivered them into chains of darkness, to be reserved unto judgment;

Sin is not an earth original. It began in heaven.   In many ways angels -- the original sons of God are man's big brothers. When Adam and Eve sinned they were following in the footsteps of Big Brother.

Sons of God can fall (be cast out because of sin or  simply  rebel and leave heaven).

Rev. 9:1

[1] And the fifth angel sounded, and I saw a star fall from heaven unto the earth: and to him was given the key of the bottomless pit.

Isa. 14:12-15

[12] How art thou fallen from heaven, O Lucifer, son of the morning! how art thou cut down to the ground, which didst weaken the nations!
[13] For thou hast said in thine heart, I will ascend into heaven, I will exalt my throne above the stars of God: I will sit also upon the mount of the congregation, in the sides of the north:
[14] I will ascend above the heights of the clouds; I will be like the most High.
[15] Yet thou shalt be brought down to hell, to the sides of the pit.

Rev. 12:1-4

[1] And there appeared a great wonder in heaven; a woman clothed with the sun, and the moon under her feet, and upon her head a crown of twelve stars:
[2] And she being with child cried, travailing in birth, and pained to be delivered.
[3] And there appeared another wonder in heaven; and behold a great red dragon, having seven heads and ten horns, and seven crowns upon his heads.
[4] And his tail drew the third part of the stars of heaven, and did cast them to the earth: and the dragon stood before the woman which was ready to be delivered, for to devour her child as soon as it was born.

When Angels manifest on Earth they appear to be men.

By men I mean male human beings. There has never been an appearance of an angel on the Earth that look like a female. Sometimes they are resplendent and cause fear and sometimes they do not project this light.

Gen. 19:11-21

[1] And the LORD appeared unto him in the plains of Mamre: and he sat in the tent door in the heat of the day;
[2] And he lift up his eyes and looked, and, lo, three men stood by him: and when he saw them, he ran to meet them from the tent door, and bowed himself toward the ground,
[3] And said, My Lord, if now I have found favour in thy sight, pass not away, I pray thee, from thy servant:
[4] Let a little water, I pray you, be fetched, and wash your feet, and rest yourselves under the tree:
[5] And I will fetch a morsel of bread, and comfort ye your hearts; after that ye shall pass on: for therefore are ye come to your servant. And they said, So do, as thou hast said.
[6] And Abraham hastened into the tent unto Sarah, and said, Make ready quickly three measures of fine meal, knead it, and make cakes upon the hearth.
[7] And Abraham ran unto the herd, and fetcht a calf tender and good, and gave it unto a young man; and he hasted to dress it.
[8] And he took butter, and milk, and the calf which he had dressed, and set it before them; and he stood by them under the tree, and they did eat.
[9] And they said unto him, Where is Sarah thy wife? And he said, Behold, in the tent.
[10] And he said, I will certainly return unto thee according to the time of life; and, lo, Sarah thy wife shall have a son. And Sarah heard it in the tent door, which was behind him.
[11] Now Abraham and Sarah were old and well stricken in age; and it ceased to be with Sarah after the manner of women.
[12] Therefore Sarah laughed within herself, saying, After I am waxed old shall I have pleasure, my lord being old also?
[13] And the LORD said unto Abraham, Wherefore did Sarah laugh, saying, Shall I of a surety bear a child, which am old?
[14] Is any thing too hard for the LORD? At the time appointed I will return unto thee, according to the time of life, and Sarah shall have a son.
[15] Then Sarah denied, saying, I laughed not; for she was afraid. And he said, Nay; but thou didst laugh.
[16] And the men rose up from thence, and looked toward Sodom: and Abraham went with them to bring them on the way.
[17] And the LORD said, Shall I hide from Abraham that thing which I do;
[18] Seeing that Abraham shall surely become a great and mighty nation, and all the nations of the earth shall be blessed in him?
[19] For I know him, that he will command his children and his household after him, and they shall keep the way of the LORD, to do justice and judgment; that the LORD may bring upon Abraham that which he hath spoken of him.
[20] And the LORD said, Because the cry of Sodom and Gomorrah is great, and because their sin is very grievous;
[21] I will go down now, and see whether they have done altogether according to the cry of it, which is come unto me; and if not, I will know.

Gen. 19:1-13

[1] And there came two angels to Sodom at even; and Lot sat in the gate of Sodom: and Lot seeing them rose up to meet them; and he bowed himself with his face toward the ground;
[2] And he said, Behold now, my lords, turn in, I pray you, into your servant's house, and tarry all night, and wash your feet, and ye shall rise up early, and go on your ways. And they said, Nay; but we will abide in the street all night.
[3] And he pressed upon them greatly; and they turned in unto him, and entered into his house; and he made them a feast, and did bake unleavened bread, and they did eat.
[4] But before they lay down, the men of the city, even the men of Sodom, compassed the house round, both old and young, all the people from every quarter:
[5] And they called unto Lot, and said unto him, Where are the men which came in to thee this night? bring them out unto us, that we may know them.
[6] And Lot went out at the door unto them, and shut the door after him,
[7] And said, I pray you, brethren, do not so wickedly.
[8] Behold now, I have two daughters which have not known man; let me, I pray you, bring them out unto you, and do ye to them as is good in your eyes: only unto these men do nothing; for therefore came they under the shadow of my roof.
[9] And they said, Stand back. And they said again, This one fellow came in to sojourn, and he will needs be a judge: now will we deal worse with thee, than with them. And they pressed sore upon the man, even Lot, and came near to break the door.
[10] But the men put forth their hand, and pulled Lot into the house to them, and shut to the door.
[11] And they smote the men that were at the door of the house with blindness, both small and great: so that they wearied themselves to find the door.
[12] And the men said unto Lot, Hast thou here any besides? son in law, and thy sons, and thy daughters, and whatsoever thou hast in the city, bring them out of this place:
[13] For we will destroy this place, because the cry of them is waxen great before the face of the LORD; and the LORD hath sent us to destroy it.

You can see angels and not know that they are angels!

Heb. 13:1-2

[1] Let brotherly love continue.
[2] Be not forgetful to entertain strangers: for thereby some have entertained angels unawares.

Judges 13:1-21

[1] And the children of Israel did evil again in the sight of the LORD; and the LORD delivered them into the hand of the Philistines forty years.
[2] And there was a certain man of Zorah, of the family of the Danites, whose name was Manoah; and his wife was barren, and bare not.
[3] And the angel of the LORD appeared unto the woman, and said unto her, Behold now, thou art barren, and bearest not: but thou shalt conceive, and bear a son.
[4] Now therefore beware, I pray thee, and drink not wine nor strong drink, and eat not any unclean thing:
[5] For, lo, thou shalt conceive, and bear a son; and no rasor shall come on his head: for the child shall be a Nazarite unto God from the womb: and he shall begin to deliver Israel out of the hand of the Philistines.
[6] Then the woman came and told her husband, saying, A man of God came unto me, and his countenance was like the countenance of an angel of God, very terrible: but I asked him not whence he was, neither told he me his name:
[7] But he said unto me, Behold, thou shalt conceive, and bear a son; and now drink no wine nor strong drink, neither eat any unclean thing: for the child shall be a Nazarite to God from the womb to the day of his death.
[8] Then Manoah intreated the LORD, and said, O my Lord, let the man of God which thou didst send come again unto us, and teach us what we shall do unto the child that shall be born.
[9] And God hearkened to the voice of Manoah; and the angel of God came again unto the woman as she sat in the field: but Manoah her husband was not with her.
[10] And the woman made haste, and ran, and shewed her husband, and said unto him, Behold, the man hath appeared unto me, that came unto me the other day.
[11] And Manoah arose, and went after his wife, and came to the man, and said unto him, Art thou the man that spakest unto the woman? And he said, I am.
[12] And Manoah said, Now let thy words come to pass. How shall we order the child, and how shall we do unto him?
[13] And the angel of the LORD said unto Manoah, Of all that I said unto the woman let her beware.
[14] She may not eat of any thing that cometh of the vine, neither let her drink wine or strong drink, nor eat any unclean thing: all that I commanded her let her observe.
[15] And Manoah said unto the angel of the LORD, I pray thee, let us detain thee, until we shall have made ready a kid for thee.
[16] And the angel of the LORD said unto Manoah, Though thou detain me, I will not eat of thy bread: and if thou wilt offer a burnt offering, thou must offer it unto the LORD. For Manoah knew not that he was an angel of the LORD.
[17] And Manoah said unto the angel of the LORD, What is thy name, that when thy sayings come to pass we may do thee honour?
[18] And the angel of the LORD said unto him, Why askest thou thus after my name, seeing it is secret?
[19] So Manoah took a kid with a meat offering, and offered it upon a rock unto the LORD: and the angel did wondrously; and Manoah and his wife looked on.
[20] For it came to pass, when the flame went up toward heaven from off the altar, that the angel of the LORD ascended in the flame of the altar. And Manoah and his wife looked on it, and fell on their faces to the ground.
[21] But the angel of the LORD did no more appear to Manoah and to his wife. Then Manoah knew that he was an angel of the LORD.