practice on some spare parts, the last thing you are gonna want to do is paint your own car the first time you ever spray material out of an air gun...i practiced on many things before i started spraying cars. i painted parts for customers for a year before i even sprayed my own car,fatigue while spraying takes a toll and will make you really sloppy. get some spare fenders or junked up hoods, prep them and paint em. youll get the feel. and you best learn how to wetsand and buff.