I thought I answered something similar to this but now I can't find it. Ok, so similar to what I said in another post.
First up, it can take several weeks for a dog to feel settled in a new environment, so I wouldn't be trying to do too much with her, other than just letting her start to feel that this is home.
Try this with the walking problem. First up, don't take her outside for the initial session. Just put her leash on, and if necessary let her settle & get comfortable about having it on. If all is well there, then take the leash in one hand, and a really yummy treat in the other hand. Now take just one step forward and hold the treat about a foot from her nose. Once she takes that one step, give her the treat & make a nice fuss over her. If she were a puppy, I'd say take the leash off now & end the sessions there. But as she is an adult, you may be able to successfully repeat the above a couple of times. Don't over do it. End on a high & successfull note. Tomorrow, repeat the exercise, still inside the house, adding more & more steps to the exercise. Always end on a high note. When she is walking around the house happily after you & those treats, that is the time to venture outside and see how you go.