Digital portrait painting

I have been watching Angel Ganev's video tutorials(!), which i must say are not exactly the regular kind of videos. Literally every sentence that comes out of his mouth are hurtful, and weirdly also helpful.
I love his styled art, they are so amazing. I tried to paint something that looks like his very recent pencil sketch. And it did not turn out as i hoped. It was a mess and a disaster.
I say every art practice goes fun, but this one was not. May be this is not my cup of tea. Also because i don't understand a lot of things about faces.
Also i chose some messed up colors for this and i don't know why.

Here are some messed up process shots: