First thing to understand is that you're not on a platform. If you prefer, you're on many platforms all at once.

Check your relays list. You're basically posting to a bunch of websites all at once. If you don't like the moderation policy of a relay, you can remove it, or hide it in your global view but keep it for people you follows.

Discovery is best done as a network effect (and honestly "friends of friends" should be its own view)

Follow some people and check who they follow and repeat