Does the Son of God have a beginning?
“Without father, without mother, without descent, having neither beginning of days
nor end of life, but made like the Son of God
, he remains a priest continually” (Hebrews 7:3 MKJV).
You're confused about several things. The begetting of Jesus that most matters happened at His resurrection, not at physical birth or at some time before the world was created. The Scriptures never say or teach that Jesus was created or begotten before His physical appearing. Here's what they do say:
Acts 13:32-37 MKJV
(32) And we preach the Gospel to you, the promise made to the fathers,
(33) this God has fulfilled to us their children, raising up Jesus, as also it is written in the second Psalm, “You are My Son, this day I have begotten You
(34) And that He raised Him up from the dead, no more to return to corruption, He spoke in this way: “I will give you the holy promises of David.”
(35) Therefore he also says in another psalm, “You shall not allow Your Holy One to see corruption.”
(36) For after he had served his own generation by the will of God, David fell asleep and was added to his fathers and saw corruption.
(37) But He Whom God raised again saw no corruption
“And from Jesus Christ, Who is the faithful witness, and the first begotten of the dead
, and the prince of the kings of the earth. Unto Him that loved us, and washed us from our sins in His Own blood” (Revelation 1:5 KJV).
It's through this begetting that believers are begotten:
“Blessed be the God and Father of our Lord Jesus Christ, which according to His abundant mercy has begotten us again unto a lively hope by the resurrection of Jesus Christ from the dead, to an inheritance incorruptible, and undefiled, and that fades not away, reserved in heaven for you…” (1 Peter 1:3-5 KJV).
You say that Jesus Christ is the Creator and that God our Father is the Creator, too, through Jesus. Yet throughout Isaiah the Lord says that He alone is God, and there is none beside Him:
“Declare and bring near; yea, let them take counsel together. Who has declared this of old? Who has told it from then? Is it not I, the LORD? And there is no other God besides Me; a just God and a Savior; there is none besides Me” (Isaiah 45:21 MKJV).
So there is only one God with no one beside Him, contrary to your description of two.
Isaiah also says that the One Who is called the everlasting Father is also called the Son given to us:
“For to us a Child is born, to us a Son is given; and the government shall be on His shoulder; and His Name shall be called Wonderful, Counselor, The mighty God, The everlasting Father, The Prince of Peace” (Isaiah 9:6 MKJV).
So if you believe Jesus is God, then God is also Jesus. There isn't another God beside Him.
In 1989, when George Bush became the 41st President of the United States, his son, George W. Bush wasn't President. In 2001, when George W. Bush became the 43rd President, his father wasn't President. There is only one person in the office of President, just as there is only one God. George junior and senior are not the same person. You aren't your father and your father isn't you, but Jesus Christ is Almighty God
Does it matter whether you see or understand this right now? Not necessarily. If you believe that Jesus Christ is Lord, and turn from your sins to Him, trusting in His righteousness and redemption through the obedience of faith, you will be saved. And you will come to know Him for exactly Who He is, not according to your carnal senses and very limited understanding, but by your spirit through His, the Spirit of God.