Honestly, it was a piece of cake. Seriously! The hardest part is what you are doing right now and that's the liquid diet. I couldn't do it and called off my surgery. The doctor found out (because I canceled it through his business office) and said that it was ok for me not to drink the bariatric stuff. Each doctor is different and has a different procedure for pre-op. I actually weighed more than you.
You may have discomfort in your shoulder but I didn't. You may have gas but I didn't. You may be a little uncomfortable and that I was. But only for a few days. I went back to work after five days. You won't want to eat. You will be drinking liquids. I found a great drink and that was Ocean Spray's Diet Cranberry and it only has five calories. I still drink it as it tastes so good!!! I also recommend going to Diet Direct and ordering their blueberry Protein pancakes. Easy to make - just add Water or skim milk (tastes better with the milk) and cook it in a pan with some butter spray like Pam. It's 15 grams of protein!!
Good luck!