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
The links from the github in case anyone wants to learn more (in order of the list):
https://web.archive.org/web/20210901023138/https://mstdn.social/@feditips/106835057054633379
https://raddle.me/f/lobby/96713/heads-up-the-tankie-behind-lemmy-ml-got-banned-from-r
https://raddle.me/f/lobby/155371/warning-lemmy-doesn-t-care-about-your-privacy-everything-is