Here's a pretty snazzy rattle-can job I did.
http://www.rcuniverse.com/forum/m_4710528/tm.htm
It's very important to get the body clean and have the window decals applied correctly(no air bubbles and pushed down to seal sufficiently).
By setting the cans in warm water prior to spraying you are a) warming the paint so when it sprays it is more uniform and you won't get as much/any "blobs" of paint ruining your work and b) by having warmer paint in the same amount of space it is raising the pressure in the can.
Since it's your first body, I'd recommend either a solid color or a two color fade to keep things simple. Once you have the basics down then elaborate on it with the next body.