If you want to learn to draw cars and you have limited art skills you don't have to worry, you can actually draw some decent cars once you learn the basics and do a little practice.
If you want to fast track your car drawing skills you should purchase one of the car drawing books available to learn what the pros do and discover the shortcuts and secrets.
If you want to start right out drawing a car and getting a feel for the shapes and how shading works, try tracing a picture of a car and shading it in.
You will start to get an idea of what to expect of the finished product, but you still have to learn how to layout the body from the very beginning so you can make your own.
Drawing your own car involves laying out basic the shapes for the body and wheels.
You need to have an understanding of perspective so you can add dimension to the car.
And get an understanding of how light plays on the car so you know which areas are darker than others, as if the light is shining on it from a particular angle.
Having a good set of pencils is important, get a variety of different hardness's.
This will allow you to draw from very light to very dark.
A good light source so you can see what you are doing would be nice.
Sometimes two lights from two angles makes it better.
Don't try to draw on a shaky table, use one that is solid so it will not move around on you.
The best thing you can do is practice and learn all you can even if it means buying a something to learn from.
You can be amazed at what great looking cars you can come up with.
You might find yourself drawing cars for your friends to use on a web site.