Why are you browsing on a different instance? Stay on lemmy.world and search for communities from there. You should be able to see like http://lemmy.world/c/asklemmy@lemmy.ml. Note that you are on your instance but the @ tells it to grab the community from the other.

I’m doing my part!

I can’t find a single one of those in the app store, all they all in beta or some developer mode?