Hi, new user coming from Reddit, as many. Trying to orient with Lemmy, I realize that I still don't understand the idea of instances well enough. Or maybe the fediverse. So there are plenty of instances, and each is supposed to be dedicated to a topic, but this is a very fluid definition. Anyhow, how do I search for instances? I mean, if I'm in Lemmy.world, I can click "instances" and I get the list of instances that are relevant. Sure, I can use google for that, but my logic tells me that there should be a more organic way.

And this leads to another question, how can I browses communities on other instances with my already existing account? What about platforms such as mastodon where I'm supposed to be able to browse and submit and such?

And finally, is there a search per community possibility?

Sorry, I'm still confused about these.