The best auto body repair job to start with as a beginner is a job you can afford to mess up on. It may take a few tries to hone your body repair skills. The bent bumper on the car your wife has to drive every day to work may not be the best project to start out on. Consider using the car taking up space in your garage or backyard, or a friend’s project vehicle to try out your auto body repair skills on. This way you have room for error and can practice your skills without risking the vehicle you depend on for transportation.
For more info, see Auto Body Repair for Beginners