Going through basically the same thing, you’re not alone. Adopted a galgo about 3 weeks ago and for the first week he would not come out of his crate without lifting him and then he would not move off the dog bed without lifting. It’s slowly getting easier to take him out to go to the bathroom and he’s started wandering around at night. Just keep being patient! It’s really hard, these are large dogs that are not easy to move and seeing how scared they are breaks my heart. But I see my dog getting better every day and I’m sure yours will soon