Going through a similar experience with my Mom, a lot of unknowns although I have a notebook full of information. I made sure she had all of her favorite foods, coffee, soda, a few candy bars the last few weeks before surgery. I tried teaching her to communicate on a smart tablet, but she had no interest. She was confused after surgery, but did okay with a white board. Does your daughter have a medical POA, just to be on the safe side?
I also made sure everything in her home was clean, no laundry, cleaned frig out, etc. Made sure she had elastic waist pants and loose shirts, flat slip on shoes with good grip. I also got an extra key to check her mail and handle things. I got a list of people she wanted me to keep in contact with. My out of town family is communicated through updates via Facebook.
One thing that has helped me with post diagnosis and post-op to keep everything straight was requesting medical records on a monthly basis. I have a binder with divider tabs so I can easily reference stuff (i.e. labs, surgical report, my own notes, questions for her doctor, treatment plan, etc.)
Surgeon wanted to start some physical therapy after she was released from ICU. I was told she would be in ICU for 5-7 days. Surgery went awesome with minimal blood loss. Big complication was breathing on her own. She is in a specialized facility to help wean her off the ventilator as she had a tracheostomy (temporary, according to her doctors).
I hold my Mom's hand a lot and talk to give encouragement, but it appears she gets agitated with too much talking. Her doctor says everyone is different and will recover differently. I prepared as much as humanly possible, but there will be bumps in the road. Take it one step and one day at a time. Take time for yourself, even if it's 30 minutes or whatever you can manage.