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
Doing a pretty shit job at it.
I used to use reddit. Those devs made the same mistake, and I dont respect either.
Then develop it yourself.