Hopefully, if this question isn’t (as I tend to suspect) a joke, and if you’re interested enough in religious studies and role-playing games to want to know this question, at some point you will find a game with more interesting religious content than D&D, such as Aquelarre… or GURPS Religion .
But if you are dead-set on D&D, reading and education tend to help game-master skills for any RPG, as discussed on this other forum