jointhefediverse.net seems to be a commonly linked resource for directing people to join the Fediverse.
Curiously, it does not list Lemmy under the list of Reddit alternatives. Their GitHub README explains why.
Previous relevant discussion: https://lemmy.ml/post/78808
Have you been on Reddit lately? It’s insanely depressing and aggressive, too. Even more so in my opinion. I used to be reddit addicted but it’s so bot infested, mean-spirited, and kind of vapid and shallow that I get bored after the first page or two. Lemmy still has a long way to go but I’ve been having more fun and interesting conversations on here.