Leave her alone for a week, and then offer live. Once she has taken a few meals, you can worry about switching to F/T. In the meantime, you can also clutter up her cage with more hides and crumpled newspaper - that's a pretty spacious enclosure for a baby BP. Do NOT move her to a feeding bin - this is unnecessary stress that can distract her from eating. The whole logic of "tank aggression" is ridiculous, anyway. Why would a snake be less likely to bite you when she is moved from the feeding bin back to the regular enclosure, considering she is already in feeding mode? As far as her hiding, that is normal, natural BP behavior. She will never be a display snake like your corn might be. The heavy breathing is a fear reaction, which she will eventually grow out of.
I hope that covered it.Oh, and no, I wouldn't be worried about her yet. She just needs some settling-in time.