I've been here for a bit more than a week now and my biggest advice and is to take it as it is. Take a deep breath, accept that this is Lemmy and not something else, and that you're feeling it out. This is not relearning a bike, this is getting in a peddle boat for the first time. Similar, yes, but also it's own thing.
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Yeah it's different, you'll burn in pretty quick though, just have to get used stuff being spread across a bunch of instances. It feels pretty natural after using it a while. The designers try to make it easy. It's kind of like email where each community has two parts to its name.
ok, so i have been here for like a whole hour now so i'm a pro! Jk I still don't get a lot of it but I did find this cool map that shows you large communities! https://lemmymap.feddit.de/