Theory isn't trivial, though it becomes second nature once you truly understand it, which is why it may seem so.
Don't worry about a canvas full of fail, too. You've gotta fail first before you get better, after all. One of the reasons why I like sketching with my tablet more than on paper is because if it turns out bad, I can just delete the layer instead of having to rip the page out of my sketchbook or something.
EDIT:
@cloviastudio
Oooh! I like that.
I've been trying to incorporate my lineart more fluidly into the picture, like what you did there.
Don't worry about a canvas full of fail, too. You've gotta fail first before you get better, after all. One of the reasons why I like sketching with my tablet more than on paper is because if it turns out bad, I can just delete the layer instead of having to rip the page out of my sketchbook or something.
EDIT:
@cloviastudio
Oooh! I like that.

I've been trying to incorporate my lineart more fluidly into the picture, like what you did there.