Anyone know of a good digital art program to learn on?

I have so much trouble trying to understand layers in photoshop.

I guess more specifically, I can't understand how to change between layers in photoshop elements, and can't FIND my layers in Corel.

!~#@$%
I've been going through youtube videos and I can't understand the whole layer thing. Everyone just moves to the damn coloring, and I have NO idea what's going on. No one bothers to explain HOW exactly, they're painting behind their lines.

Can anyone point me to a good youtube video series, or even just a web page that says in text, step1, 2, 3, etc?

I'm so frustrated!

Commissions:
1.)  runt Sissy Puppy bunnysuit
2.)
3.)

Comics Commissions:
1.)  TigerStripes Tailcock Raping
2.)  Shakeidas Mousie Milkslut Bodysticker
3.)  Taki Watersports TG bodysticker

**Prices**

Sketch: $5
Lines: $10
Shaded: $15
Each additional character: +$5
Comics: $20 per page