here’s a cool site to browse for communites https://browse.feddit.de/ just copy the link and paste it into your search bar from your instance. then click subscribe
you might need to hit search a few times for it to show up, and you might need to hit subscribe a few times if it says pending instead of joined. and also if the subscribe button doesnt load correctly I hit the name of the community to reload the page and it usually makes it work

There are a few across the Fediverse

piracy@kbin.social

piracy@lemmy.ml

piracy@lemmy.dbzer0.com

piracy@lemm.ee

dbzer0.com is Reddit /r/Piracy’s instance. lemmy.ml is a pre-existing one. kbin.social is a new one I think. Most of the Reddit crowd is hanging out at the dbzer0 instance.

EDIT: Added another one

I wrote this a day or two ago, might help get you started.

https://static.xtremeownage.com/blog/2023/join-the-fediverse/