I have been there JGo. I had doubts hours after the surgery, when you feel the bloating and everyone tells you that you just need to get up and walk. My wife and I went Red Lobster two days before my surgery. I thought that I would order one of each from the menu, but I didn't. One thing that I wish I had done, was apply more of the VSG post-op diet before the surgery. If you get used to starting the day with a protein shake and Greek yogurt now, it will be less 'painful' later (post-op). My first whey powder shake was a week after surgery. I tried this beef based first but it didn't 'go down' well. (Who thought Raspberry flavored beef powder was a good idea?). As for alcohol, your body won't miss it and will thank you for it.
IN my case, I had already cut back because alcohol interferes with NSAID's and Tylenol type medicines that I took for my arthritis. Sometimes I do miss the days of us going out and not being conscious of what I order from any menu, but every time I can buy smaller size on the pants and shirt rack, I feel better about it.