I'll try that. That is originally how I taught her how to back up on command (Just doesn't like backing up onto things). I'll try it some more with the narrow hallway but with something behind her.
On the confidence topic, She is a very shy and timid dog towards everything: people, dogs, new environments, etc. She's getting better every day, but I feel as if doing "challenging" things can help boost her confidence. For example, when I first started teaching her touch on command, she was very scared to touch whatever object I put in front of her, but now she does it with ease, even with loud crinkly aluminum foil. She will even put her two front paws on a skateboard and move it a little. We've worked on stays and other things we are doing in class in very distracting environments like the public park and in our yard where cars are zooming by and students walking to class. We are only on week 3/8 of class starting tonight. I like that we are doing very minimal obstacles because I do want to start off on the right foot. Even the instructor has said that we really only do that in Foundations 1 because people tend to think that you need to introduce these things to your dog in the very beginning and sometimes they get frustrated or uninterested when you don't. I think the classes have helped her (and me) so far, even with the small amount of time we have spent there. She seems to be improving inside and outside of class and I do my best to work on the "homework" from class every week, but sometimes I get stumped.