First, congrats on your dream snake.
Secondly, I would leave her alone for a few days to a week. Make sure temps are great and just let her be.
Then I'd offer again and yes, you can leave a F/T prey item in over night to see if she eats. I wouldn't leave it longer than overnight though.
I don't know much about these guys and what they eat at that size and how often. I also cannot advise on temps, etc.
Make sure you are offering exactly what the breeder was. If she was on pinkies, offer pinkies, etc.
It sounds to me that she's getting used to her new environment still.
Also, most of my snakes would eat anytime, but all are nocturnal and look for food at night. I'd be offering when she's most likely to eat, which might not be the morning.
Good luck and keep us posted.