Yeah once you're on it it's pretty great, although still a bit confusing with how the federation works. But learning what you should think about when choosing an instance, benefits of niche and general instances, big and small instances, what to do if you end up regretting your choice, how to find and add your friends and if they're on an instance that federates with yours or not, learning about Mastodon privacy when it comes to posts and "DMs", instance security etc etc etc. It's a lot.