I'd suggest taking a few shots with the attitude "if these come out then great but if they don't I'm not the least bit worried". Maybe just take something at home that doesn't involve wasted effort if the film is trashed, something different. I've taken some of my most interesting shots by taking a much more relaxed attitude to what I'm doing.
Sorry to hear that you have been unwell and welcome back. Take it gently and don't be discouraged if you don't immediately get fantastic results. I found photography a great rehab when I was recovering from surgery. It got me out and about and looking at the world again. I think photography and "mindfulness" go together rather well.