it's very boxy and also very high poly which is going to make it very hard for you to shape without getting all lumpy and bumpy.

I use a nurbs curve -> nurbs surface -> poly surface workflow that is more like CAD surface modeling approach which might be a little advanced to start out with. However, for a all poly and subd workflow you might want to look into this https://simplymaya.com/autodesk-maya-...=109&sub_cat=5.

Also one of sites users named Acid44 has been modeling automobiles for quite a while. Check the WIP section and you might get some ideas from his work.

-Rick