LIBRARIANS OF MASTODON (freakin' killer punk band name, by the way):
Check out Trunk, a list of Mastodon lists on Community Wiki! They've got lists of different people to follow on Mastodon but the GLAM lists are either pretty short or non-existent. Hit up the Wiki and get added to the list(s) of your choice!
Trunk is out? Oh dear
(Watches Cybre.space follows)