The Father didn't be come flesh. The Holy Spirit is the "Fathers" Spirit. The Father is the only unbegotten God.
Jesus is the only begotten Son. He was given supremacy as He is before all things and is also the Firstborn from the dead. In Him it did please the fullness of God to dwell. If you see Him you see the Father. The very image of the invisible God. All of the Deity dwells in Him. But His spirit is the beginning of the creation of the Father. Everything else the Father made by Him, through Him, and for Him. The Son who was, His Spirit, was in the body prepared for Him. The Father was living IN Him doing His work.
I am not one who denies error. But Jesus is a being that existed with the Father in the beginning. I am not positive in what John's point is in calling Jesus the "Word". But I am positive it wasn't the Father that became flesh.
I have a clue in 1John where the same John now expands that description to the "word of life" and again who was "with" the Father in the beginning.
1John
That which was from the beginning, which we have heard, which we have seen with our eyes, which we have looked at and our hands have touched—this we proclaim concerning the Word of life. 2 The life appeared; we have seen it and testify to it, and we proclaim to you the eternal life, which was with the Father and has appeared to us.
Officially its stated. The Father unbegotten. The Son begotten of the Father before all worlds but not made. The only begotten Son. In regard to the Son I agree in part.
Christ Jesus was, in fact, God made manifest in the flesh; which is why He was conceived by not man but the Spirit.
“And the Word became flesh and dwelt among us, and we have seen his glory, glory as of the only Son from the Father, full of grace and truth.”
John 1:14
“And we know that the Son of God has come and has given us understanding, so that we may know him who is true; and we are in him who is true, in his Son Jesus Christ. He is the true God and eternal life.”
1 John 5:20
The Father is Spirit, which is why those who worship Him must worship in spirit and in truth.
Jesus said to them, “Truly, truly, I say to you, before Abraham was, I am.” John 8:58 - Who identified Himself with “I AM” in the Old Testament? In Exodus you can see where God said to Moses, “I am who I am.” There is only ONE “I am”.
Isaiah 9:6 - “For to us a child is born, to us a son is given; and the government shall be upon his shoulder, and his name shall be called Wonderful Counselor, Mighty God, Everlasting Father, Prince of Peace.” - This was a prophesy of the coming Messiah, Christ Jesus. Of the names it says He will be called are Mighty God and Everlasting Father.
1 Corinthians 8:6 -
“Yet for us there is one God, the Father, from whom are all things and for whom we exist, and one Lord, Jesus Christ, through whom are all things and through whom we exist.”
“Thus says the Lord, the King of Israel and his Redeemer, the Lord of hosts: “I am the first and I am the last; besides me there is no god.”
Isaiah 44:6
“I am the Alpha and the Omega,” says the Lord God, “who is and who was and who is to come, the Almighty.” - Revelation 1:8