This is the best place to leverage yourself to the next professional step
LinkedinLearning.com
More tutorials than anyone else and they’re well produced and vetted. This is a great place to start and has excellent other tools.
Given that I have 10+ classes there, it’s embarassing that I don’t’ have my affiliate code setup.
Tao of Color
https://taoofcolor.com/ - a great, weekly free newsletter on color