draw. every now and then, for years and years and years.
that's how i learned to draw. just draw n draw n draw. scribble, doodle. never stop having fun. if you get frustrated take a break and come back to it. every year redraw a picture from last year to see your improvements. study other artists too, see what they do, what you like and incorporate it into your own thing. you aren't born with your own style. your style is created from experimentation, just gotta get there.
all art takes is time and study. if you want it and you're willing, put in the time and study and you will become amazing.
as for teaching you digital... i could tell you good programs and how the tools work, but i can't teach you to draw. you have to learn that.
And don't be like me where "every now and then" means "2 or 3 pictures every couple months or so". ---
