Cant afford a trainer.. need puppy advice?

Help please.. I saved a 1 year old puppy from the pound. I felt so bad for her she was shaking in the corner and scared to death I thought she was abused. The pound said the owner had a stroke and someone brough her and 4 other dogs in. She is actually housebroken so she couldnt be a stray. she is TERRIFIED to walk on the leash, go outside, and she goes into a corner in the house and will not move. If I pick her up and put her in the open she will lay where I put her only. She will scoot to her food when she doesnt think you are watching. My older dog trys to get her to play but she just lays there and looks at him. It is so sad. I am at a loss. She trys to run under cars outside or if she sees a corner she trys to go there. She will NOT walk on the leash at all I have to carry her to the gr. I know I can love her enough and I have patience I just feel a little helpless and so sad that she wont move from where i put lay her. She is not mean at all but like a little scared mouse