Dear friends,
thanks for sending me your sketches and minibooks to evaluate. However today I would like to re propose you a very simple sketch tutorial I made some time ago to start from basics of drawing with simple rules.
How to sketch a side view car in 3 simple steps, following these simple steps you can exercise "before" going directly to photoshop or similars. In fact; what it really counts at the beginning is to draw free-hand over and over again untill you get used to it. By repeating your sketch many times you will improve and your brain will learn and memorize your steps giving you confidence and making you feel happy and proud.
This is the right approach for beginners, so to see the tutorial click: How to draw a simple car in side view