lemmy@lemmy.ml is probably your best bet since I think that’s the community about Lemmy on the instance run by the Lemmy devs. lemmy_support@lemmy.ml is another option but might be more about running an instance, though I’m not positive.

Great news! Jerboa is fine for now but it definitely doesn’t feel as polished or user-friendly. I’m looking forward to having some more options. I’m following the Artemis development already but I’ll be keeping an eye on this for sure.