Hi, to be a first try it is very good. I guess there are options to get curves smoother and shades in the angle you want them as well. But to make a concept this is all you need. When you start with the interior you will probably find out that the exterior have to be adjusted, but it is always fun to try to get a useful interior inside what started as a profile view...
Btw, I removed your hotlinked picture and posted it as an attachment.