Yes, @stewart_reptiles did mean to say 6 to 12 qt tub. It might sound small, but a hatchling ball python will fit in the palm of your hand. Generally, if you can fit 2 hides that your snake fits in snugly on each end and one water dish about the same size as the hides, then the enclosure is probably not too small.
Personally I house hatchlings in 7qt tubs, and then move them to 16qt tubs, then 32qt and finally 42qt (or 60qt for females) based on if they continue to feed well after moving up. Some snakes will prefer the more confined spaces and will stop eating if put into something too big, so generally you’ll have better chances of success getting your ball python to eat if you keep the size limited.
Height of the enclosure can also be a factor and I keep all my tubs under about 7 inches tall. Most of their predators will approach them from above, so they prefer to feel like they are well covered from the top at all times.
Best wishes for getting started, it wasn’t that long ago that I was in your shoes trying to learn the basics and find my first python. And it’s definitely still a learning experience!