to join communities on other instances, you can get URL for the community on that instance and just paste it into the search. it'll get translated into something your local instance can reference, in this case: https://lemmy.world/c/retroid@kbin.social
from there, you can subscribe just as if it were a community on your local instance
to join communities on other instances, you can get URL for the community on that instance and just paste it into the search. it'll get translated into something your local instance can reference, in this case: https://lemmy.world/c/retroid@kbin.social
from there, you can subscribe just as if it were a community on your local instance