@katsukichan_ Hey, I looked into it. It seems that fanart is more acceptable than fanfiction, but it sounds like it's a gray area Most people think that fanfiction - regardless of whether or not you're making money - violates Copyright, but others think it falls under the "fair use" category – as long as you're not selling them. However, "[m]ost fanfic writers who have Patron accounts just don't make enough money with it to be worth pursuing (and certainly not from a single fandom.)," so most won't sue you, it seems. I didn't look into the fanart aspect of things like Patreon, but again, it seems that's more acceptable than fanfiction, so... But, I found a couple of discussion boards asking about fanfiction, so I figure it won't be too hard to find the information about fanart's side of things.
I hope this helps you make your decision!!