Hi,
It actually sounds as though she is starting to settle in fine.
It's not uncommon for them to be wary of their hides for a little while until they are sure they are "safe" and sleeping all day is what ball pythons are all about.
She seems to be active at the times we'd expect etc. Just make sure to let her settle in with no interruptions and then try and feed her once she seems happy.
The important thing is not to panic if they do not eat right away - sometimes things need a little tweaking.