Paul gave what was of first importance:
Christ died for our sins, according to the scriptures
He was buried and raised from the dead, according to the scripture
He was seen, after His resurrection by more than 500 people that knew He had died.
If you confess with your mouth, Jesus is Lord, and believe in your heart God raised Him from the dead, you will be saved
So don’t make salvation more complicated than what scripture reveals.
God Holy Spirit will guide believers into all truth.
If you study well, and accept what scripture reveals, you will accept the Trinity.
And eventually, you will accept the doctrines of grace
Peace to you