I am so sorry you are going through this at such a young age. I had a colectomy March 13th - I had more issues with the stoma and depression/anxiety than I did with pain. My wounds took a bit longer to heal because I had been on prednisone for a long time.
Yeah- it hurt, I am not going to lie and I did have the surgery done laparoscopicially. I took pain meds for approx. 3 weeks. I would say I have a moderate pain threshold.
You are young and will bounce back quicker than a older person. Expect pain but remember it is temporary and most likely you will feel better from the UC almost immediately.
I wish you the very best and admire your courage.