"The Galactic Hub" is the best. Very active community, ongoing ambitious projects (many completed), it's really so much fun. It's also easy to get in to it. They have a "taxi service" on discord where a user gets on the mic and coordinates with you to bring you to the hub worlds so you don't have to do it manually.

If you're remotely considering it, join up. I hop on every month or two and it's a treat.