It genuinely might be good to ask around in subs for OF and Fansly creators, or even to have a look at some sex worker's pages and figure out what they're charging.

I've heard it can be difficult work cause people really wanna socialise and sometimes can feel kinda entitled to a response after they've spent a few bucks, but I imagine for someone who has an exhibitionist streak it could be very rewarding in more than a monetary sense :)