See this as a temporary difficulty and nothing to be embarrassed about, my brother had a double hip replacement and now he is pretty mobile, focus on how great you will be post op
I did mine a couple of weeks ago, but it was for non b, I uploaded everything they asked for, the declaration I took a photo of, the sizes of documents requested meant most of the documents I ended up photographing and uploading as they asked for jpeg
For accommodation I put in a house address
Surprisingly the visa was approved in under 36 hours