Dunno if you’re being serious or sarcastic but I have in this thread already, it’s literature.cafe for books and writing and lemmyloves.art for more art focused stuff. Both communities have a “411” community that lists communities to federate into other instances. Honestly I am hopeful such a list will become redundant as community navigation improves. We thankfully have a leg on lemmy compared to mastodon as you only need to federate in communities, not users.