welcome to the site!
It's actually for the best that they didn't tell you anything at PetCo as they don't know what they are talking about anyway...
Wait a week then try offering food. If he eats then you can start to handle him after 48 hours of digestion. If not I would hold off handling until he is eating.
Feeding in a separate container will stress him out, it is better to just feed him in his cage.
You should feed him a rodent that is about the same width as the widest part of the snake. Hatchling BP's generally eat hopper mice every 5-7 days.
What are you housing him in? what are you using to heat the cage/measure temperatures? What are the current temperatures/humidity in the cage?
Checkout these 2 threads:
http://ball-pythons.net/forums/showt...ius)-Caresheet
http://ball-pythons.net/forums/showt...t-Thermometers
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