Fediverse

lemmy.ml disabled new community creations. You need to join a different instance that has community creation enabled.

You can think of instance and server as the same thing. An instance of lemmy runs on a server.

You don’t have to run an instance to create a community (sub), but I believe some instances limit who can create communities.

If you run your own instance, you could do whatever you please with it. When you create a community on it, other federated instances can browse to it via community@instance.domain

Here are the instructions for hosting your own instance

https://join-lemmy.org/docs/administration/administration.html