Nostr is awesome. Lots of people just experimenting and having fun. Good mood over there! Check it out with any nostr client or just use https://nostr.rocks

Other sites here: https://github.com/aljazceru/awesome-nostr#sites

Once you have set up your keys, follow jb55 and his follower list to get started with some cool peoole! https://nostr.rocks/32e1827635450ebb3c5a7d12c1f8e7b2b514439ac10a67eef3d9fd9c5c68e245