The Godhead has always been 3 persons. Father, Son and Holy Spirit.
Genesis 1:26: Then God said, "Let US make man in OUR image, after OUR likeness. And let them have dominion over the fish of the sea and over the birds of the heavens and over the livestock and over all the earth and over every creeping thing that creeps on the earth."
This is in reference to God the Father, Son & Holy Spirit
Genesis 11:7: Come, let US go down and there confuse their language, so that they may not understand one another’s speech."
This is in reference to God the Father, Son & Holy Spirit
John 1:1-5: "In the beginning was the Word, and the Word was WITH God, and the Word WAS God. He WAS WITH God in the beginning. Through him ALL things were made; without him NOTHING was made that has been made. In him was life, and that life was the light of all mankind. The light shines in the darkness, and the darkness has not overcome it."
The Godhead has existed eternally, my friend... as God the Father, the Son Jesus, and the Holy Spirit.
He did not have to learn to be man as God can not be taught anything because He is all knowing. Instead, he stooped down and submitted to being a man to fulfill the will of His Father... which was to be the blood atonement for the sins of His people.
Krispy