Your version is way too blocky.
This is more as it's supposed to look:
It's not all that bad a start, although I recommend that you keep it plain scheme while you work on it.
Edit: Also, this aircraft, with the fact that you have no rearward vision, would also have a spine running behind the cockpit to the rudder, much like the Spitfires or the P-47s.
If they had it as you have it now, they would without a doubt put in a canopy with 360 view.