OK, I have been on the fence and waiting for the doors to reopen for Authority Hacker Pro and tomorrow is the day :)
They released this video less than 24 hours ago and it's golden! and I think this will help anybody out looking to find a niche to get started.
Authority Hacker sales page - https://www.authorityhacker.com/system/ They also have a Pro version.
Blog Mastermind 2.0 sales page - https://www.ejinsider.com/bm/
RankXL sales page - https://www.rankxl.com/authority/
All these courses look very interesting. I think they are enough to cover...