Do you believe this:
And in one Lord Jesus Christ, the only-begotten Son of God, begotten of the Father before all worlds; God of God, Light of Light, very God of very God; begotten, not made, being of one substance with the Father, by whom all things were made.
What you offer there is mostly man conceived, not as he is described in the word of God.
Yes I believe that Yeshua is the only ‘begotten’ son of the Father. He said that they are one, and I believe him.
The Word of God says nothing of his substance, so we cannot go there authoritatively. We know from the Word that without the son was nothing made that was made. That is enough for me to know on that subject.