You have to remember that when you're watching me do that lasso and airbrush technique, I've got close to 20 years of practice doing it. That's why it looks easy. When I first started up with Photoshop, my work didn't look anything close to what it does today. It's not an overnight thing, and does take years and years of practice.
Although my Youtube channel is geared more towards advanced level colorists, I do have a series planned out for beginners that will help with practicing techniques such as blending colors and the lasso tool. I have a couple other videos planned out first, then I'll be able to get to those. Thanks!