How long would it take? There's no definitive answer to this. As with everything, and I say this a lot, it's different for everybody. But practice and a passion helps. Plain practice can only get you so far if you don't enjoy it. Not only that but keep in mind with art that there are styles. Each artist has their own. It doesn't mean that you're worse or better because you have a different style. [spoiler]sometimes I catch myself thinking I'm not good enough because I can't use a style that I really enjoy seeing[/spoiler] Drawing digitally and traditionally vary from each other in many ways as well. I personally find that line art and sketches are more enjoyable on paper and coloring on the computer looks nicer. Allow yourself to adjust to a tablet. Because there's so many new tools and techniques at your disposal at a computer it's an excellent idea to experiment until you find what works for you. Along with all that there are many drawing programs to choose from. [spoiler]SAI, Photoshop, Illustrator, Painter, ETC.[/spoiler] Ultimately, however [unless you plan to create art for a living] draw for fun. Make what you like to make. Don't push yourself or feel rushed to get better. It's a common trap artists fall into. TL;DR I bewieve in you young gwasshoppa