Good call!
Did my part and searched them on my home instance and subbed to a few of them.
To the folks who are trying to do the same on their home instances, you can actually just paste the URL directly into the search field (eg. https://lemmy.dbzer0.com/c/switchpiracy) instead of doing the !switchpiracy@lemmy.dbzer0.com syntax.
When you click search it may return no results or just a post or two, but just wait for about 10 seconds or so you'll see the community pop up. Like so.