I would just give her more time to get to know her new surroundings.
then after a week or two.
then I would just try to hand feed her a treat, go in slow and low. then try to keep my hand close if she takes the treat and starts to eat it. Just leave my hand next to her. give her a chance to smell my scent, right after getting the treat.
if she doesn't bite you that is a good sign. if she does bite you then you have work to do.(giving you say she was bonded to her first owner she should NOT bite you hard.)