I thought a great way to end this message is to let someone much larger than myself make this point.
Creativity is never really about the tools or what you're using to get your idea. As Bruce says here, "there's no right way, no pure way of doing it—there's just doing it."
The act of thinking and solving problems is what's important, and I just happen to believe that sketching is one really powerful tool to do it.
I really believe there's a way to do it that should feel easier, and you shouldn't have to struggle with the feeling that you suck at it, because this is one case where sucking is not a bad thing, if you're doing it with the right intent of solving the problem in mind.