I wasn't nervous, I was excited like you and ready to get started. I didn't have much gas pain at all. I was sore the first three or four days. I wasn't told to go on the liquid diet, but I did cut back and lost 4 pounds before surgery. I followed the Doc's orders when I was released. The first day home was an adjustment in the way I sat down and got up due being sore. I am self employed, so I felt compelled to go to work right away. I think if I worked for someone else I may have taken at least one day off. I took some liquid pain meds the first and second day I was home, that was all I needed. I feel I was lucky and was in good hands, everything went off without any problems.
Are you getting the surgery in the U. S.? I had mine done close to Beaumont, Texas, (SE Texas) about 30 min. from home. Having the fill was surprisingly easy. My band will hold 10 cc's the Doc put in 3 cc's. I fell no restriction. About 2weeks after surgery I could't eat much at one time and lost weight fast. I guess may be a little impatient. Hope everything goes well for you! I have no regrets!
-ken