I use Kbin, so my experience is a little different, but do Lemmy instances not have default communities? If not, that seems like a pretty good addition, but if so, then I think that experience is going to be largely dictated by the individual instance you’re signing up with.
I also recommend Pluto.TV for anybody who enjoys Plex’s live TV. They’ve got a similar business model in place (watch for free with regularly-scheduled ads, like normal TV), and some different content sources (as well as some overlapping sources). Like Plex, it also doesn’t require any account to watch. It also has an app for most TV platforms.