If you went to a Pet Store they would most likely steer you to a terrarium with plenty of accessories, likely even with a light as this would make them the most profit.
Ball Pythons like to be in a rather small, dark place and a tub fits the criteria at a very inexpensive price. No light source is needed.
If you end up with more than one snake, a rack system would be the most efficient and cost effective way to go.
It is essential to have a source of heat and a method to regulate it.
Look at the care sheets on this site and feel free to ask questions.
The primary mission of this site is to help the novice learn to care for their ball pythons properly.
I commend you for studying the requirements of care before purchasing your first ball python.