If you just migrated from #Meta or #Twitter, here's some of the best advice I got when I moved here, and still use.
There's no algorithm on the Fediverse, so it's all about who you follow, not who follows you.
Use the web interface if you want to edit your posts easily, combined with an app.
Look at # you want to follow, follow someone interesting, look at who they are following, follow some of those people. Unfollow and follow # and people, until you have a nice feed for yourself to look at.