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
Everyone should defederate from that toxic shithole. It serves no purpose that isn’t duplicated elsewhere only without the heavy-handed admin/mod team.