Hi @CallieAlreza,

While I believe there are a few people who watch over the Free for teacher environment for issues, it's mostly a what you see if what is available type of thing, and not all Canvas features will be available there.  Specifically for making courses public, the Canvas Free-for-Teacher FAQ does say you can contact Canvas support, but I don't know if there are other requirements or anything.

I hope this helps!

-Chris