Okay, here are a few groups to consider:
The Tribe Builders Network. In this group, you can leverage the power of sharing to build an audience.
Medium Mastery. In this group, members help each other use Medium to the fullest.
The Authorpreneur Club This group is about best practices for marketing a book.
20 Books to 50k. This is a group of authors helping each other sell more books.
All these are a great place to start. And honestly, if you’re like me, you don’t have to be active in too many groups. Good luck, and I hope you find this helpful.