Jon H, ,
Sorry to hear you have to go through this at your age, you are fortunate that they caught it when they did. Looking back on my experience the surgery wasn't that bad, and they gradually increase the food and by dinner time I was back to regular food. They even had me up walking before 9:00 PM. I was home the next day by noon. You should not have any problems, just keep everything clean.
Good Luck tomorrow I'll say a prayer for you.