I migrated masto instances without complications, but some people have had a worse experience than I

You can migrate to a new account… this can achieve the same thing. It doesn’t always work as well as you’d wish though

Block negative communities, post good stuff, subscribe to what you care about, make nice comments, vote, eat your vegetables

Not sure if underrated, but i like https://metapixl.com/ and https://mathstodon.xyz