I eat Indian food all the time and have no problems with it! Some of my favorite dishes are onion bhajia, lamb korma, saag paneer, and chicken tikka masala.
Butt burn is a very individual phenomenon. I only had it 1-2 years after takedown, pretty much regardless of what I ate, and never since. The reason for butt burn immediately post colectomy is the excessive alkalinity of the stool due to the sudden shortening of the digestive tract. In many cases your body adjusts the pH levels over time before stool reaches the J Pouch. With some people, spicy food is a problem, but I eat all kinds of spicy food and do not have any problem with it.
Best case scenario is you will not have butt burn and will be able to enjoy spicy foods. Worst case is you have to tone it down.
BTW, 29 is the exact age at which I got my J Pouch. I am now 57. 28.5 pretty good years. I have had to treat pouchitis/Crohn's inflammation, but its been treatable and my quality of life is high.
Best advice I can give you is that everything is trial and error. Choose a good surgeon, someone experienced with doing J Pouches, and understand that as you heal your experience may have some commonalities with others but may also be unique. There are no hard and fast rules on what works and does not work well in terms of foods or meds, so your body will become a private laboratory, so to speak. It will also adjust over time, so that what you could not eat or digest early on you may be able to later. Good luck with your experiments! One last thing- don't make judgments about things like butt burn based on what you read on this board, which is a support board for those with problem J Pouches. The posters here do not represent the universe of J Pouches, but mainly the universe of problematic J Pouches. The people who have great J Pouches do not need support and, for the most part, do not come here.