You did improve through the whole exercise and congratulations on finishing. I have to say that your focus on accuracy made your lines suffer. Even on the last pages I see a tiny bit of wobble. When you do your warm ups really use that shoulder. If you still not comfortable doing that, go back to the lesson. I did a few times and suddently I was doing really straight lines, ignoring accuracy, and little by little accuracy improve.

You did get the perspective idea of the exercise and I am impressed how often your lines converge really close. Congratulations on that.