It would be very well worth it for you if you force yourself to learn how to draw the types of characters you want to make in 3D. The ability to draw is a talent, of course, but by following certain rules of proportion, shape, etc., you can learn. Any good bokkstore such as Barnes and Noble and Books A Million has books on the subject of drawing. Not only would drawing help ypu in 3D, but probably even more importantly, learning to draw well teaches you to see detail better as well. That having been said, most of the good 3D modeling packages have tools to "box model" an entire figure, literally starting with a box, or something very similar in shape. Do yourself a favor though and learn to draw. If you got frustrated drawing, you're likely to get frustrated modeling in 3D. I almost always sketch out on paper first what I'm going to model, even if it's something as simple as a table, and most pros create full character studies on paper - many drawings - long before they even start at the computer.