The term “community” is somewhat ambiguous here: the one “Lemmy community” doesn’t really exist, because the whole Fediverse is the community. It’s not limited to Lemmy users and can’t be separated. At the same time, there are the various groups/topics, which are also called “communities”.

Thanks for the clarification. I’m still a little insecure about the nomenclature; also, my interface is in German, so I’m not sure if a “Beitrag” is actually a “post” and so on… My question aimed at “the one Lemmy community” – as far as I can see, it’s not very easy to really participate on lemmy from e.g. a Mastodon account. But please correct me if I’m wrong – part of the fedivoyage is finding out how good the softwares federate…