Ask YC: learning to draw

Hello fellow news.yc'ers, I need your advice. The problem is this: I am a competent programmer, but have no skills, talent or natural inclination for drawing and graphic design. Lately it's been stopping me from doing some interesting things with my projects. How to get a baseline skill level at drawing? How long should it take? Any experiences with online lessons? I'm quite willing to make a time investment comparable to learning a foreign language, about ten hours a week. Thanks in advance for all advice!