I would say be prepared to follow the guidelines given by your surgeon. After the recovery time liquid and slushie diet, you will need to eat healthy dense foods, protein first then fruit and veg and low GI carbs last.
Drink loads of water, Maybe even join weight watchers, slimming world or Rosemary Conley diet group to keep you on track.
It may be a while before you get a good restriction and til that happens it might not feel much different to how you do preop.
Just make sure you are clear and accept the fact that just having the band in is not enough.
You have to still do most of the work to get it to be a success.
The good news is that providing you eat the right sort of foods and change your lifestyle by adding exercise daily and keeping treat food to moderate amounts say once a week,...then it will be a lot easier to stick to and get results from than without a band.
Hope that helps a bit.
I have just skimmed over a lot of it, obviously there's much more to it than that but you can get to know us banders as we all have different hints and experiences with our individual band journeys x