Wash your hands with antibacterial soap before you handle her. It prevents you from spreading bacteria onto her skin, and also washes the smell of food off of your hands.
Do not hand feed her, because then every time she sees your hand, she'll bite you. Also, get her a separate container to feed her in, with no substrate in it, for the above reasons, and also so she doesn't ingest any of it which can cause intestinal blockage. You should never ever feed a snake in the same enclosure as the one they live in, she really can ingest the stuff on the bottom of your tank, thats not good.
For the first three days you should allow her to get used to her surroundings. DON'T take her out of her tank. Let her stay there for a while and get used to it. So i would suggest you put her there and leave her alone for a while.
Then take her out and keep sudden movements to a minimum. Try not to get your hands to close to her head. But take her out and play with her every day for at least ten minutes, except if she's hiding, in which case, let her be. Snakes become more tame the more you handle them. So with time, Medusa will become a lot less aggressive, she's just stressed out from the move, the change in environment, and the new person handling her. Because stress can cause a lot of problems for snakes, just let her be. But she'll come around. Hope that helps! :)
OH and btw, great name! You should post a picture! (Of the snake i mean!)