Hey it's great to see your work. Your values in the black and white drawing of the car are good. The color one could be pushed a little farther by studying the real color of those highlights on the red paint. The full size self portrait would be hard to do. I think it must have been hard to draw that big. Did you or your camera crop off part of the head and feet? Nice foreshortening on the arm. Did you do that all in pencil? Geez.
"The progress of learning is from indefinite to definite, not from sensation to perception. We do not learn to have percepts but to differentiate them."