I know if you change the color to something other than what's on the title, you will have to retitle the car. Probably $50 or so, depending on your state.
If you have to ask, it WILL come out looking like shit, but if you do three things TO THE MOTHERFUCKING BEST OF YOUR ABILITIES it will help it suck less.
1). Prep like you mean it. Sand it all down nice and smooth, to bare metal if at all possible. A DA sander will make things easier. Be sure to finish with a fine grade sandpaper, as if you can feel it, you will see it. If there's spots that need touch up with some bondo, just make sure you can't feel the difference between the repaired surface and the shit next to it. Also, tape off your moldings and windows, using a razor to cut the tape and get it right down into the cracks.
2). SEAL IT UP WHILE PAINTING! Get one of those ghetto garages made out of tarps, tape down the edges and seal it up. Hose it down just before you bring the car in to minimize dust, just don't have the thing dripping on the prepped car either. Minimizing airborne shit while your primer/base/clear are drying will make those fisheyes, dead bugs etc in your paint fewer and farther between.
3). Use good materials. basically any assclown can spray on the new auto-leveling and quick drying paints, just follow the mix destructions from the auto store you're getting it from and you should be good. They even have one step paints my little cousin could spray now, but they cost more. I'd say spend it if you want decent results, and your auto paint store guy should be able to help you. A decent HVLP gun will work ok even on a shop compressor, gravity feed is best and be sure to paint something else first to get used to the spray pattern so your shit doesn't look runny and drippy.
Or you could go to Maaco and have a semi-pro fuck it up for you for around the same cost.
Either way, good luck!