I recommend searching for hashtags about topics you are interested and also of popular interest. Communities on satellite are also helpful.

You can also search interesting people in X (or any other centralized social media) using #Nostr, get their public key there and look for them here. Take care of your private key using nostr:npub1getal6ykt05fsz5nqu4uld09nfj3y3qxmv8crys4aeut53unfvlqr80nfm chrome extension. 🙏 Good luck