I accidentally made Catholicism into a shonen power system and now I don’t know what to do

Let me start off by saying I'm an atheist, but I've always had a fascination with religion and mythology. I'm also trying to draw my own comic. I'm not aiming for anything revolutionary or mindblowing, I just wanna make a fun, shonen-esque action comic that I can upload on the web just for fun and to hopefully get to a point where I can make comic drawing a career.

I started out with just the idea of demon slaying. I know it's a little cliche but you gotta start somewhere and I like the idea of demons and heroes using magical weapons to hunt them. So I asked myself, what should I call a group that battles demons? At the back of my brain the word 'exorcist', so I finally went with it. Then I asked myself what I should call their magical weapons? Well, 'real' exorcists use rosaries, so maybe using that term could be fun as a nod to the whole idea of exorcism. And then it kind of snowballed from there. Now I have an entire setting with about a thousand years of history, a hierarchy for both the demons and the central church, three separate power systems, and a whole bunch of magitech style technologies built around the central concept of the setting.

Now that I've at least come close to a full setting however, I kind of have a weird feeling that maybe I shouldn't use it. On the one hand, there isn't really any 'religion' in my idea. I don't reference any actual religious teachings, the reused terminology doesn't even really match up with anything in the real world (well, except demons. Because they're demons). I'm not trying to make a statement about whether or not church or religion is good or bad, and the whole thing is mostly just an organization in the background. But on the other hand, these are things people actually believe in. It's not like Rick Riordan and his half blood camp full of greek demigods. As someone who isn't even a part of that whole realm of belief, is it wrong of me to use their terminology for my own world building? I just wanted to get some opinions on the matter and see what other people think, whether I should use what I've come up with or throw it out and start over.

And as one final thing I will say that while yes I could change the terms I've used for everything and it would still hold up as a setting, it feels like it loses something in the process. I don't really want to change the setting that much because I wouldn't find it as fun.