Legend of Zelda - Wind Waker

Wind Waker may not be my favorite Zelda but the official artwork manage to amaze me with the detail!
So here it is! This is using pencil and drawing pen, I'm not printing this. I just want my art to be the same as possible to the original one.
Somebody can teach me one or two things about Digital Art? Im very new to digital art and I want to learn to make one.

Lastly, comments and favorite are appreciated, thanks a lot

Legend of Zelda belongs to Nintendo I only own my drawings