I used to participate in #FollowFriday during the early days of Twitter, figured I'd share a just a small, abbreviated list of great follows:
@donmelton
@Sarahp
@Yukari
@bigzaphod
@siegel
They have all been great resources as I've gotten my sea legs back under me on Mastodon after some lengthy periods of inactivity. But there are many, many other excellent follows here - browse your local timelines and start meeting all the interesting, cool folks!