So I’m fine with pretty much any NSFW post and don’t want to hide them generally from my feed, but I really don’t want the OF/attention-whore posts. Is there a way to keep these from showing up on my feed? Apologies if this is something easy or generally known, but I’m a pretty newbie.
Not really, no. You can block communities that allow those types of posts, however.
Edit: I say this because I’m making a couple of assumptions here. Mainly that you’re not talking about direct links to onlyfans, but rather the people who post pictures of themselves to tangentially related communities trying to lure people into clicking on their profile where they have a link to their onlyfans. You can certainly block individual users so that might be good enough. As for blocking links to specific domains I don’t think that’s supported on the web client (it would a nice feature) but it might be available in some of the apps.
Android: Connect and Voyager allow filtering by URL