There's a phrase around the forum- "A happy ball is a hiding ball!" When he is stressed he will be out and pacing his enclosure, and it usually means something in the husbandry isn't quite right. Now, that said, the first week or so he might be agitated, so don't freak out too much if he roams the tank during the day. It's a big change, and he will explore. Just make sure he has two snug fitting hides (One on the cool end, one on the warm end) and plenty of darkness at night.
Read EVERYTHING you can! There's a lovely Ball Python caresheet on the forum which has good solid guidelines for nearly everything you need to know.
Welcome to the dark side!![]()