I'm just starting as far as digital art goes and I hadn't seen the video before I started this exercise so I went with a very different process. I started in hard edges and blocked out everything with simple values, getting those shapes as correct as I could before adding a few more values.
Eventually I started to blend with the smudge tool. Finally I went over top of it with a few more hard edges. I think I could have gotten it to be more accurate but I didn't want to sink any more time into this (I've been working on it for a week).
