Just as a warning, you are on Kbin, which is a bit different from Lemmy. The two communicate just fine, but have different UIs and features. Lemmy generally has "communities" instead of "magazines", but they work in mostly the same way.

For Lemmy, generally going to the search menu in the UI allows you to search for communities, but not every one will come up (for example if the server you are on doesn't know about another new server yet). If is often better to use a third-party website like browse.feddit.de to find new communities.

Not sure how subscribing to them would work on Kbin, though.