Was with God - This expression denotes friendship or intimacy. Compare Mark 9:19. John affirms that he was "with God" in the beginning - that is, before the world was made. It implies, therefore, that he was partaker of the divine glory; that he was blessed and happy with God. It proves that he was intimately united with the Father, so as to partake of his glory and to be appropriately called by the name God. He has himself explained it. See John 17:5; "And now, O Father, glorify thou we with thine own self, with the glory which I had with thee before the world was." See also John 1:18; "No man hath seen God at any time; the only-begotten Son, which is in the bosom of the Father, he hath declared him." See also John 3:13; "The Son of man, which is in heaven." Compare Philippians 2:6-7.
That's an interesting way to put it, no?
Yet, the Trinity is not a fundamental doctrine. It is not a doctrine of salvation, nor does the Bible ever state it is.
One should conclude then that believing in it or not is not essential to one's salvation.
John 6
28. Then they asked him, "What must we do to do the works God requires?"
29. Jesus answered, "The work of God is this: to believe in the one he has sent."
(Of course; NOW you have to figger out just what is meant by 'one'.)
Reading comprehension is not your strong suit is it kiddo.