Hi Shelley, welcome to the group! You've found the perfect place for support.
The most important piece of advice I can give you is to always consult your bariatric team with questions and follow their advice. Every bariatric team is different and their advice may differ from one patient to another, there are reasons for this. For example, my bariatric team always has patients do the two week preop liquid diet, until I came along, I was the first patient ever, they told not to do it, because my BMI had dropped so low I was close no not qualifying for surgery.
Keep a notebook with you and jot down questions as they occur to you so that you don't forget to ask about them when you see your team. No question is silly. It is better to ask them than it is to ask us. We don't know if they count any liquid towards water. Some do, some don't. My team didn't have a pureed stage, it had a soft food stage, similar but not the same. My team didn't allow protein shakes after full liquids to make protein goals, where most others did.
Communication with your team is vital. You should be extremely comfortable with them. Remember you are trusting them to open you up and reroute your digestive system. You need to trust them enough to have open & honest conversations with them.