If you still want to join Lemmy (join-lemmy.org) (seems as welcoming as Mastodon has been!), avoid lemmy.ml and lemmygrad as they are official servers ran by the developers. Lemmy.world and lemmy.blahaj.zone seem pretty good!
Alternatively, you could also join Kbin, (kbin.pub) as it can still interact with Lemmy based communities! (Although they call communities magazines and follow the !name format instead of @name)
Has any joined a Lemmy instance recently? I looked through a few, tried to join and just couldn't get the sign up page to work on any of them. Fill out the form, click submit and the form goes nowhere.
Reddark - A site listing subreddits are going dark or read-only on June 12th and after. (reddark.untone.uk)
As of this posting 639/5279 subreddits are currently dark. Many more to go dark on June 12th.