Honestly depends, but if you want an all-around good instance on a misskey fork, try lethallava.land

Honestly Misskey forks for all their flaws can absolutely take this opportunity to properly advertise themselves as viable alternatives. As someone who uses a Misskey fork, I love the UI in comparison to Mastodon, and the communities in Misskey forks are a lot less techie and a lot more laid back and goofy most of the time from my personal experience.