What instance are you trying it on? lemmy.ml is very clogged at the moment. I’m using sopuli.xyz, its server has just been upgraded, and the owner is very quick to approve new users.
Created a Beatles community on this instance if you’d like to join it!
Here you go: https://sopuli.xyz/search/q/Beatles/type/Communities/sort/TopAll/listing_type/All/community_id/0/creator_id/0/page/1