My submission for freehand cylinder assignment. Any feedback is welcome

Faced challenge in visualizing the proportions of fore-shortening in extreme positions like extreme up-left/up-right and placing the center line accurately without looking at the 3D model. May be it comes naturally with more practice. Any feedback/help is appreciated.

Pretty interesting exercise...I can see significant improvement in my apple pencil pressure control with this exercise from where I was before. There is a still lot to improve though. Any feedback or tips are appreciated. Thanks :D