Twan, thanks for the paintover. I checked my proportions and noticed my head was a little too short and my legs were noticably too short. Everything else seemed to be in place or close enough, though. Here's the fixed version. I marked down the fixed proportion line and the old one next to it. Also put down my proportional reference points.
The legs are not anatomically correct because I haven't gone over the anatomy on them yet. Should be the next subject on my video course.