I think am sort of struggling to wrap my head around how lemmy really works and where should be hanging out. It was easier on reddit in the sense that if I wanted to go LOTRmemes, there was only subreddit but here on Lemmy, there seem to be multiple instances of the same community :D
This one took awhile to wrap my head around as well. I'll try to explain. Each Lemmy instance has its own unique communities. So you might find LOTRmemes on lemmy.one, lemmy.ml, and Lemmy.world. Each is a community of its own and unrelated to the community of the same name on a different instance. You can choose to subscribe to each one you find or only the ones that seem to fit your tastes.