Depends on what your interests are but at a bare minimum I’d avoid creating an account or a community on .world (corpo bootlickers), .ml (ultimate power tripping bastard admin), hexbear (highest troll ratio of anywhere)

I’ve got several accts on different instances. Each have their quirks. Like some don’t allow downvotes or different words, and others are federated or defederated with other instances I wanna see or avoid on occasion