Communities on nostr kinda suck at the moment. You can do a few things like start a simplex chat group for keto people.
I use rabbit client and follow a few hashtags I am interested in, it's an easy way to interact with focused interests beyond the follow feed.
Yup. Following hashtags really does help, but, having dedicated communities will make nostr better, IMO.
Guys, what about audio chat? I get tired of typing all day with internet work