Click communities at the top and sort by all, then it's just to search away!
Lemmy
Everything about Lemmy; bugs, gripes, praises, and advocacy.
For discussion about the lemmy.ml instance, go to !meta@lemmy.ml.
Thanks! I didn't see the little button there to switch to all. Also I don't think it works in Jerboa.
I think Jerboa already searches All.
You can search on your instance in the search area: https://lemmy.ml/search
You can do a general search if you want or if you know the name of the community you want to sub to, you can search for [!community_name@instance.url](/c/community_name@instance.url)
Another great way to simply find a community is by using https://browse.feddit.de/ Search for an interest/community there and then do a search with the community address on your instance like I said above.
Check out https://lemmy.world/post/9296, it explains several ways to discover and sign up for new communities. It's more than a bit confusing without an introduction, but not to bad once you get the walkthrough.
browse.feddit.de