A list of my favorite tutorials out there, obviusly, not all of them, just the one I've seen that I can reccomend 100%
All Ryan Lang videos are awesome.
Maciej Kuciara, I'll definetely go for the Illustration Bundle
Realistic orc portrait by Dave Rapoza. One of the best out there, 17 hours talking about everything you need to do this art thing + the painting process which it's great too.
Color Basics from Mike Azevedo
Schoolism - Painting with Light and Color with Dice Tsutsumi and Robert Kondo