I took an auto body class at our local Vo-Tech. Adult evening classes that turned out to be pretty decent if you paid attention. I have been able to lay down primer and base coat clear coat in my garage. I have had good results and some things had some set backs. Mostly it is 95% surface prep. If your metal looks like shit then that is what you will end up with.
Plus by the time you spend on materials, compressor, a good sander and spray gun you will be into it you might as well consider having a shop do it if you dont plan on using those tools ever again.
For my painting situation which is outside under my enclosed car port on warm days I have had the best results with Valspar paint and Transstar primer. I cant remember what kind of clear I bought I am trying a new brand this time.
The one thing I have trouble with and I need to learn more about it is polishing out clear coat. I still have not mastered that yet lol.
But I would not consider just "jumping into it". Look around for a class. There is alot more that goes into it then just buying a gun and laying down paint.
But here is some work I did yesterday. I spent the last couple weeks in my spare time prepping my fenders and bumper cover for my MKII MR2. Hopefully Thursday if it is warm enough I can lay down some black and clear it is nice outside.