This was fascinating. It was interesting to see how much of my drawing skills come from my brain and how much from my body.
I copied a reference to make it easy on myself. I made myself erase with my left hand too (which made me somewhat reluctant to erase, it turns out). My left hand had no idea how to draw a straight line or even shade the simplest thing. I felt like a 3-year-old, but it was fun.