Teaching Myself How to Sketch

My method of designing a hat is to mentally visualize it and work from there.  The problem is that when I try to recall multiple designs, most of the time my memory fails me.  So, I spent a few hours yesterday trying to teach myself how to do a little millinery design sketching.  I gave up on trying to add detail to the eyes, nose, and mouth and opted for what you see in the image.  I guess I'll take a fashion design sketching class when I retire.