@blusso I had a colon resection last July and I too was dreading the after effects having read about all of the possibilities. My worst fear was having constant diarrhea. I am happy to say that it’s not been as bad as I feared. In fact, I feel a lot more regulated than I was before hand. The first three months of my recovery actually went well and I was being very careful about eating and walking, etc., I have since experienced some after effects like bloating, distention, and back pain.
I have to note that I already had acid reflux (and taking PPIs for it), which causes similar symptoms so it’s not new to me and it’s hard to know whether it’s the surgery or the existing condition that’s causing this.

It has been a journey to figure out what are the triggers. I would suggest early on to be just very careful about what you eat and try to eat a low residue diet for the first few weeks. I gradually added more fibre because that’s important for a healthy colon. I found that eating a healthy diet and getting up and walking a bit after eating, as others have mentioned, really helps with gas.
It is all very experimental. I’ve taken gasx when I need it. I find that ginger tea or even a little piece of candied ginger helps to settle my stomach. I changed over to lactose free milk and yogurt. I switched to one cup of decaf a day.
But I guess you can see from the comments here that one size doesn’t fit all and it will be a bit of a trial and error. I just hope you don’t get discouraged and don’t worry too much about it (like I did) beforehand. Just take things slow and let your body heal.
Attention to my breathing has helped with bloating and anxiety.
Wishing you the best result!