I have a few now just to test it out. I want to use feddit.nl as my standard server, but I just haven't fully figured out how this all works.
Like for example I'm on lemmy.world and subscribe to something, that channel/sub doesn't seem to appear on feddit.nl. there can be a channel with the same name but it isn't the one I subscribed to.
do things from your home instance, so once you find a community on another instance you want on your home instance, go to your home instance and search !community@other.instance eg !asklemmy@lemmy.ml and itl will pull in a few posts to start off, if you subscribe to that remote community hen your home instance will keep on getting posts.