Hello, and congratulations on being a new snake mom! She’s a gorgeous girl with a beautiful headstamp! I’m sorry she’s not quite eating yet; one first thing I’d like to mention is that with feeding live it’s strongly advised against leaving the mouse in her enclosure any longer than 30 minutes. I do feed live to my snakes as well, and I wish I had known this several years ago when I first began to feed my little guy. I left the mouse in with him unsupervised overnight and the mouse bit him. This happens a lot more than you’d think, and a snake can even die from a rodent bite. My little guy got a pretty yucky infection that took a long while to heal, even with vet intervention. So, just make sure that you leave it in, supervised, for no longer than 30 minutes at a time.
If you just got your baby, it’s important to completely leave her alone for a week or so to adjust to her new environment.
Don’t worry so much about your girl not having eaten just yet; even though she’s small, she will be fine for a few weeks without eating. A lot of ball pythons (including mine) have been known to go off food for a month or more (as they grow, not necessarily healthy for your baby to go so long without food but try not to worry too much).
Here is a recent discussion that should help you navigate getting your new baby girl to eat, linking below: