In the new testament we see a gradual process of turning Jesus the man into "god the son".
Paul - resurrection
Mark - baptism
Matthew - conception/birth
John - pre-human
Early christians found themselves worshipping Jesus in practice but were embarrassed by what amounted to polytheism. The doctrine of the trinity with its convoluted waffle about substance and essence, and the endless arguments about terms like, ousia, homoousios, hypostasis etc is risible.
It is impossible to state the trinity simply in your own words without committing a heresy. Go ahead and try it.