I am new and trying to understand how Lemmy works. I am posting this from my lemmy.world account, on a lemmy.ml community. It seems like you can read, post, subscribe to whatever community outside of the instance you’re registered with. So… Why register on lemmy.world vs lemmy.ml or any other instance, if all communities are accessible to everyone?
I’m also new, but I found it easier to subscribe to a community in your local instance. Just click the subscribe button. The only way I’ve found to subscribe to a community in another instance is to fiddle with the URL which is annoying if I want to subscribe to a hundred external communities.