You might not be able to draw the first drawing right now, but if you as bad at drawing as the average person, I can't imagine it taking more than a few days or

You might not be able to draw the first drawing right now, but if you as bad at drawing as the average person, I can't imagine it taking more than a few days or weeks (max) to get to that level, with a very modest time commitment. 10 years of practice dedicated to self-improvement? You'd be extremely technically proficient by then.