I like the general idea of the idea, as said above, pillow shading is a bad thing to do now :P But as your learning i wont put a dogs butt in your face.
The angle facing down, as its all facing down you should be able to see the top of the bumper. None of it can be flat
Also, lines should be smoothed off, so a rather dark blue in the curves of the lines to remove the jaggedness. Dont add this to the straight lines, that turns into pillow shading :o
You got the general idea of direction of light, but it all needs a bit more detail.
I love the grills on the front of the car, work on them more, give them a shine in areas, and especially on the main ornament at the front