Ok, I get that the fediverse is complicated if you think deeply about all the interconnectivity and federation etc, but there is no reason you even have to think about any of it
you must be kidding. there is no reason to think about that?
to find communities/magazines you have to use some 3rd party tools (you may be lucky and see something in the "all" feed, but that is not guaranteed), then when you find it, you can't just click subscribe, you have to grab the url, go back to another tab where you are logged into your instance and subscribe by manually constructing the url, or pasting the url somewhere (maybe, haven't tried that way).
don't take me wrong, i am fan of open source, which is why i am here, but if you don't see how this is complicated for average non-tech-savy user, then i am not sure what to tell you.