By boost do you mean repost? I've been using hashtags, but it's hard to gauge what effect that's having. I have definitely noticed the effects of engaging with people in various ways. It's a real social network!

Yes, different clients call it different things lol. Definitely social!! See what other musicians are using, the grownostr, plebchain, and I can't remember the other popular ones right now, don't do much good because they get spammed all the time. I know I've seen musicstr and music being used.