If I were too ask what kind of paint should I use......seems too me anyway that one needs to consider the following.
How straight is the body...this will determine colors and metalic or none matalic.
Most folks are in love with a color and dam the tarpedos thats what they paint but you gotta consider the shape of your body work and what if anything your hideing.
What is the use for your vehicle is it a driver? Or is it a show car?
Finally where will you store it? Inside or out? And what is the climate.
Pastels are best for long life in most climates. Matelics are okay but tend to be weak when clear cost wears off. Dark colors are great for that PERFECT body.
If you at high altitude like Denver stay away from reds and dark colors the sun will eat you up. You will be painting every couple years, Even if you store in gurage things seems to not last at high altitude.
Finally enanals, clear coat base coat etc. are good for drivers and in some cases okay for show but are never as pretty as a good Lacquor. Don't care what you say Lacquor will never be beat by the enamels and polys with all the orange peel and if you try to build up with clear to make it look pretty you cut your paint life
Anyway thats what I think in what kind of paint and as far as prep, they all take as much effort depending on what you expect don't be afraid to try things and the only thing is cost. If you got bucks you can experiment if not take it to someone and they will charge you more than you want too pay......and it won't last any longer.