Im joining in on the reddit ditching thing, and was kinda worried at first that i wouldnt be able to like use it the way i did reddit as it feels like a whole new place, but after engaging with posts and people and actually being a part of lemmy rather than being lurk mode all the time i was pleasantly surprised with how easy it is to become a member of the community, theres a reasonable amount of subs (or whatever the other word for em is) that fit my interests, enough linux content and shitposting for my liking, and the overall random posts made by people equally fed up with Leddit. (also i admit i used reddit a little cus there was this post on the fedora sub showing how to fix a sound issue i been having after a recent update)
I don’t think you can on Beehaw.org. All communities on your instance need to be created by an admin.
Probably a good thing overall, considering the thousands of dead subs that are going to be all over the place come Monday.
There is good in allowing ordinary users to create subreddits, though. I don’t think /r/trees and /r/marijuanaenthusiasts would have happened if only admins could create subreddits.
I think the corollary in lemmy world is, if your instance admin won’t support your needs, then you simply start your own instance that you can run as you see fit.
a little more work and learning curve involved, but much more resilient in the long run