PeerTube instances can be a bit hit and miss, some of them are completely unmoderated and full of awful content.
However, there are some really nice useful PeerTube instances with excellent admins, for example:
You can also follow accounts from PeerTube through Mastodon, just click on "subscribe" within PeerTube. You can also subscribe via RSS if you prefer.
Fosstodon is an English speaking Mastodon instance that is open to anyone who is interested in technology; particularly free & open source software.