Happy to hear Matthew is out of surgery. I know it was a long anxious day for you.
It will be a bit rough these next few days but he will notice a difference with the surgical and healing discomfort that will be so much different than the UC suffering he has been dealing with.
Definitely stay ahead of the pain while in the hospital. There is no reason to be in unnecessary pain while he is there. Definitely walk as much as possible. My husband had the same surgery last Dec...6 months ago. The higher podium type walker made walking much easier to contend with. I also walked with him and freed up the nurse's aides time. Once they got him out of bed and various tubes taken care of I took the time to walk with him.
Diet will be slow - definitely take it slow too. The IVs make it so he won't be super hungry these next few days anyway.
The big things are....walk, walk, walk, a lot of water/fluids and when he does get into solid foods....chew chew chew.
Protein is very important as that speeds up the healing. Tough to get all the protein in with the appetite level not there. The slimfast powdered shake with 8 oz of milk is 15 grams of protein. One or two of those a day really does help when you can't consume the protein otherwise.
I helped him and still do with the changes. He can do it on his own and has. Most times I am around and the extra pair of hands makes it go faster and more efficient for us.
There is a definite learning curve - we are not experts but doing well overall.
There is a ton of info available here and many willing people to help so just ask when you get stuck. Hopefully you and he will get good assistance and education from your ostomy nurse in the hospital. Don't be in a big rush to get out and get home...if he needs the care and attention and he isn't ready--- don't go home too soon either. They don't keep you longer than necessary anyway.
Good luck - you will both be amazed overall how fast he is going to feel so much better as he heals from the surgery. The constant urgency and frequency and anxiety from the UC will be gone.
There is a trial and error period finding the right appliance - how often to change etc. but it honestly is an easier situation to deal with than the hell the UC put him and you through.
We are so enjoying life once again and have been for a few months and are doing more and more now. The ostomy is now a part of my husband and something that gave him a new lease on life. It is not a choice any one of us truly likes but in the overall scheme of things it was a choice that needed to be made as he could no longer cope and continue -- the same as your husband.
Good Luck and keep us informed and let us know anything you need help with.