Very nice to start with. What are the colors?
You do need a little work on your fuselage shapes. The cowling has a flat spot on it's side in the profile but it's very round on the real plane. The highlight on the spine should become progressively sharper but the highlight on the profile indicates that the fuselage shape is as rounded continuously right through the tail surface.
Do you have a set of drawings that shows the fuselage in cross section? Also, study photos that are looking down the fuselage from front-to-back and back-to-front. It's important to really have a good grasp of the actual contours of the aircraft and then make sure your shading shows these contours.
Overall though, it's a pleasing profile
