> worshipping a belief
Paladins are like that too in 5e but I don't really like that. Basically instead of getting your powers from a diety, a Paladin believes so hard in something it just WILLS it into power. Kind of like how gods in the first place only manifest from enough people believing in them, except in this case it's one person believing really hard. So it still fits. But eh.
But yeah you're right, I forgot half the time I make a game I just tell people to make a character and worry about the rest later. The one saving grace is it's in established D&D settings in the case of my offline games so if they wanted to find some gods to worship they could just look it up.