A happy ball python is a hiding, sleeping ball python. You'll sometimes see a little more activity when they start to feel hungry, but they do sleep A LOT. The fact that she's eating well and sleeping 99% of the time indicates to me that she's NOT stressed out.
As for pooping...they can go weeks between poops...especially when they are young and growing. They use up the food for growing energy very efficiently and it can take a while to build up enough waste to need elimination.
Welcome to BP.net!
Hope you'll hang out lots and share pictures and let us get to know you and your critters!