the highlighted part is a clear example of the next assignment.You have to draw a perspective and exploded view in a side view .Please, let me know if this help.
The top sample is finish, the idea in these color paper renderings is to valance and blend the paper with your sketch.
Remember to start working with light gray markers, and then move into dark gray markers. After the grays you will apply the color marker and the color pencil. In the end you finish your rendering applying the white and black