Welcome to BPNet. If you haven't had a chance to read it yet, here's our caresheet for ball pythons...great info here....

http://www.ball-pythons.net/modules....warticle&id=52

The best thing you can do is just get his housing stable and correct and let him settle in with minimal or better yet no handling until you have a few weekly feeds into him. Did the pet store tell you what and how he eats (rats or mice....frozen/thawed, pre-killed or live). Get him settled in properly for at least a week then try offering him whatever he's used to. An appropriate sized prey item per week, same day each week is best.

There is a wealth of knowledge here in the threads so have fun, settle in and please take advantage of our excellent search feature to find out all the things you'll likely need to know to enjoy your new pet and have him thrive in your care.