If you're looking for a reliable and responsibly moderated Fediverse server to sign up on or move to, I run a website that lists them:
All servers listed comply with the Covenant (https://fedi.garden/about-this-site/) and have opted in to being listed.
Follow the site's account to keep up to date on the latest servers added to the site:
➡️ @FediGarden
If you want help with moving a Mastodon account to another server, here's a step-by-step guide:
➡️ https://fedi.tips/transferring-your-mastodon-account-to-another-server/