Grreat Teacher, I think you'll do fine with the surgery and post-op period. Your surgeon will encourage you to get up and walk as soon as possible after the surgery, so please do so! Glad you have the walker and cane at your disposal... just make sure you label them with your name and phone number in case they get misplaced (it happens!)
If you can have some meals prepared ahead in your freezer and arrange to have someone help you clean your living space just before and a couple of weeks after the surgery, that will keep your workload to a minimum.
Finally, when you register at the hospital - particularly if you have been a patient of that hospital system while you were a JW, please, please, please have any mention of your being a JW REMOVED from your chart. That is how the HLC tracks down people in the hospital. They are granted privileges as "pastoral care" visitors and can request a list of people of their denomination admitted to the hospital when they arrive to make their Pastoral Care Visits™.
Best wishes on a speedy recovery!