Just join ones that your favorite people you follow use.
Discussion
I maintain a list here
https://git.poster.place/verita84/nostr
Please use the free speech relays before nostr becomes censorship happy
How does mostr.pub curate posts from fedi?
mostr.pub only knows about the posts that have been sent to it.
basically some nostr user has to follow a fedi account in order for it to let the server that fedi user is on that it would like to receive those.
It's similar in reverse, a fedi user has to ask for the posts of a nostr user from the bridge in order for it to send them along. It won't do that unless it thinks there is a follower relationship established
Didn’t your mamma teach you to be a leader and not a follower 😬