I lurked in Mark Dawson's Facebook Group for a while:
https://www.facebook.com/groups/SPFsecretgroup/You have to ask to join, but they let me in so they aren't picky!
Dawson markets his own 'how to' stuff pretty heavily, so buyer beware. The value comes in seeing the posts by others who share their experiences. It becomes repetitive after a while, but for someone completely new to running ads it can be helpful. You'll see discussions in there about other marketing tools like KDP Rocket, Machete and Yasiv. I haven't used those, but they may be worth a look.
I use Scrivener, and found the software publisher's forums to be very helpful:
http://www.literatureandlatte.com/forum/index.phpI used one of Gwen Hernandez's Scrivener templates, but haven't used her other resources yet:
https://gwenhernandez.com/scrivener-corner/Author Earnings has a take on Indie sales figures that the trad press ignores:
http://authorearnings.com/