Trinity isn’t difficult; it’s tertiary logic which messes most ppl up. Had my epiphany moment staying in a Russian Orthodox monastery in my 20s for a few weeks late at night. I had been reading the church fathers and finally it ‘clicked’ and it was a big woah, very personal.
I’m not religious now, but via analogies, I can be considered a believer, not a believer, both a believer and not a believer, neither.. doesn’t matter. People being mystified by quantum stuff is simply God by another name, followed with equal religious ferocity, utilizing mathematics but ultimately the same conceptual structures in the brain.
Same, different names, different religious trappings. Try seeing it from an alien POV. They won’t look much different.