when it omes to repaianting your car you have to keep 3 things in mind...first-what are youre damages, and what materials will be needed to fix thoose (if applies)?
second- your budget...how much money do you have to spend?
third- color? graphics? paint grade? clear coat grade? what kind of primer? Where? is the place vented? how much time do you have?

There are plenty of techniques to apinting but the one i reccomend most is do not hold the pain tigger and just spray away when you paint it need to be in staccato strokes to get a precise even coat

Best thing for you to do to answer 90% of these questions is to go to a Sherwinn Williams Auto Body paint store and get the materials and advice there.