Welcome, new neighbours!
While checking out this wacky new space, I'd like to emcourage everyone to check out the Local tab, either at the top of your feed, or in your app menu. That's where yoi'll find posts from "communitues" (Lemmy's "subreddits") that are hosted on lemm.ee!
A lot of communities are on different sites, and are ported (tarriff free!) for your enjoyment, but as with most things, it seems, the most sustainable way forward is to support Local!
One thing that many people new to Lemmy and the wider "fediverse" (because it's not just people on Lemmy-based websites that you'll find posting in the communities here, surprisingly enough) struggle with is that each website on the network has its own "name space", meaning that each community name can be used on each site. So, you can have, say, !pottery@lemmy.ca, !pottery@lemm.ee, and !pottery@lemmy.world. People often fret over "having to follow all of them", and wanting ways to collapse them into a single forum. And for a really niche topic, that might make sense (the thing to do, though, is just pick the one that best serves you and don't worry about what's going on on the other side of the fence). But for bigger topics, this "splintering" is often a godsend, since we can all have real discussions about the topic in smaller spaces. And, of course, !politics is going to just be meanibgfully different on .ca vs .ee vs .world.
If you look to local first, it becomes much easier to stop worrying and love the ~~bomb~~ distributed network.