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
I ran a kbin instance, which kbin forked, and man it was so resource heavy compared to lemmy. Quite expensive to run at scale. Has mbin fork helped with that?
I’m not sure about self-hosting (not feasible for me right now) but as a user it’s not bad. I can say I haven’t seen anyone complaining about it yet.