I'm in my 40s and considering training as a mental nurse. One thing stopping me is I have a back problem called spondylolisthesis. This means being on my feet and walking a lot causes me back pain and heavy lifting is not advised. I used to work in a shop standing for ages and it was painful and not suitable for me. I also suffer from chronic insomnia. I'm hoping someone here does this job and can tell me if this will be an issue.