I would start with a 2 week shut-down. You can google it, or do a search on the board. Best thing to help her settle in right now is set up a routine, and keep things calm and quiet so she can get used to her new life.
To get her used to the leash, do what people do with puppies: us a short lenght with the handle cut off and let her drag it around the house so she gets used to having a leash clipped to her. Cutting off the handle is to prevent the leash from getting hooked on things. Once in a while, pick up the leash, call her and lure her to you with treats, and just walk a few steps - if she walks with you (should be following the treats in your hands), reward her with the treats and praise her, and let her go.