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
deleted by creator
I think it might help if you advertise it more too. I haven’t heard of mbin in months and partially assumed it stopped existing
Posts not being marked as read and lack of app support.