I migrated from Twitter to Mastodon when Elon Musk took over. It’s been really nice, and I I wish I’d have known about the Fediverse before then. I may have found an instance that is too comfy and perfect for me, though… I’ve been tempted to migrate my account over to a Calckey instance, but there’s no way that I’m not staying put. Other Fedi services that I’m interested in trying are PeerTube and Owncast.
I’m on Mastodon but find myself having to remember to use it. I am also still on Twitter as I have a group of people on there that I like speaking to but who aren’t on Mastodon yet. Hopefully they will join up at some point so I can get rid of Twitter properly.
I like Mastodon but think my instance isn’t hugely active (me.uk), so might have a look at some of the bigger ones. I’m happy that Lemmy isn’t hugely hectic but for something like Twitter I would want to see a slightly faster pace