HI!! want to wish you all the best for today and the start of your journey. I'm not sure how much i an help because I had bypass surgery but no matter what the surgery it will be emotional for good and bad reasons, you are changing your life. What got me most was saying goodbye before going into theatre (I'm a cry baby), but my nurse did a good job at distracting me.
Keep to the plan don't rush anything, nor substitute something good for something bad, my sister has a friend who had a band and she would eat chocolate instead of meals because it melted before reaching the stomach and she barely lost any weight.
Don't try to do too much, i had a few pains after because i was lifting and bending and overall doing too much.
Most important things is to go to the follow up appointments, dont neglect them once you have what you want.
Also dont cope with the pain, my nurse called my her rockstar but would give me evils when I sat in discomfort... have the pain relief, it won't hurt.
Lastly... I don't know if it is the same but don't expect to sleep the first night. I had nurses, doctors coming in every 20 minutes to check something or other. It did help me get on my feet and move around quicker and resulted in me being discharged the following night.