A community dedicated to fediverse news and discussion.
Fediverse is a portmanteau of "federation" and "universe".
Getting started on Fediverse;
I'd treat it like any other clearnet site. Lemmy doesn't go out of its way to log your info (the admins certainly aren't interested in that), but it still runs on an nginx server and is subject to whatever that entails.
I follow Eugen's advice from mastodon: fedi apps are not inherently privacy-centric or encrypted, so it's unwise to treat them as though they are. Since posts are public it's very easy for outsiders to scrape data.
If you self-host yourself. You don't give your IP or personal private data to anybody but yourself. Days that gets federated to other instances is public by design, like username, avatar and posts. Maybe the list of followers etc.
Tot is useful if the instance does not know who you are. Once you register to a website, you lose half of Tor's benefits since the site already has an idea who you are.