freakin' out!

I am SO frustrated!!!! i know what I want my car to like like, but whenever I go to put it on paper, I cant seem to get the perspective right. It gets screwed up everytime, and I dont know why. The car is always disproportionate and it just doesn't look as good on paper as It did in my head. I am so confused and i'm in dire need of help if I have any hopes of getting this done in time for graduation...