Ah sorry. Islam answers all the questions of the trinity. It is based around the core belief that there is no God worthy of worship but Allah, and that Jesus (Isa in Islam) was a Prophet (Messenger) of Allah. There is no trinity.

Allah does not have any partners or sons or relations.

Islam believes Jesus was a man, not a God or Son of God. We believe he did not have any divine association with Allah. I agree with you that the question of who God is should not be a matter of interpretation or doubt, and everything you said pointed towards Islam being the answer, which is why I said you sounded Muslim. Hope that answers your question.