posted this on Twitter but it's probably useful here too:

I'm not gonna say "join Mastodon" or "don't join Mastodon" but please don't join the two instances run by the main developer (mastodon social and mastodon online), they're hopelessly overrun and as a result of that not well-moderated.

Join a small or medium-sized instance and use the public timelines. They're made up from ppl who people on the instance follow, which is why there's instances built around different topics (but you're usually welcome to post about anything). Hmu if you want a recommendation

You can also create multiple accounts, all the good apps support multi-user (I'm recommending Tusky on Android and Toot! (paid) for iOS), if you for example want an AD or an account for gaming and a personal one I'd highly recommend creating them on different instances