The last thing I bough is from Mike Corriero, there was a big discount: https://gumroad.com/mikecorriero I need to find it, and finally read it :D
I'll probably wait for the next discounts to buy new stuff.
These are the (best) things I bookmarked:
https://gumroad.com/sozomaika
https://gumroad.com/tyleredlinart
https://gumroad.com/l/udrawing
https://gumroad.com/mitchleeuwe?sort=newest

https://www.patreon.com/kirokaze
https://www.proko.com/

I know a lot of women artists who do amazing art, but I agree I found very little that do the art educations/courses.