I hope my answers bring you some comfort and peace of mind, because everything you're concerned about
was not a problem for me.
1. I don't have a nose ring, but did not need an NG tube in my nose after surgery, so hopefully you won't need one either. If you do, it wouldn't be for very long.
2. Regarding pain, you will have a pain pump with a button that you can press every 7 minutes for pain medicine. I don't remember having much pain after surgery, probably because I kept pressing the button! hehehe
Just make sure you bring chewable Gas-X tablets with you, because I remember the trapped gas was very painful before the ostomy started working.
3. There are no nerve endings on a stoma, so it is not sore after surgery. Also, I did not have to put anything on the skin around it. The Ostomy Nurse will show you how to change your wafer several times before you go home. I do recommend shaving the hairs on your belly before surgery on the side where the stoma is going to be, because it does hurt to pull the hairs out one by one the first time you change the wafer. I needed to press the pain button a couple of times to get through that ordeal!
Take a deep breath. Everything is going to be fine!
Dx'd Crohn's in '99 at 28. Proctocolectomy and ileostomy in '06.
Disease-free, medicine-free, and very thankful to be healthy again :)