my new ball python

[tgimp1]

hello everyone i am new to this site but am so happy i found it! i bought my first ball python 3 days ago. i have him in a glass terrarium with a hide spot on the both the cool and warm side of the tank with aspen as a substrate and a waterbowl in the middle. since i brought him home he has remained hidden under his hide on the warm side and hasnt come out at any stage.is this normal? i have not handled him yet to give him time to acclimatise to his new home but he is due to be fed tomorrow as it is a week since he last ate. i plan to feed him in a plastic tub tommorrow with a thawed small mouse which is the correct food i have been told by the pet shop.my last question is how long after eating should i leave him in plastic tub as i dont want to risk him regurgitating his food during the transfer back to his tank. any help guys it would be much appreciated!