I was a bit nervous before surgery too (Mine was almost 3 weeks ago). I suppose it is only natural. But, like everyone else, I was up and walking fairly quickly.
In my case, they wouldn't let me get up the first evening (my surgery was in the afternoon), since my blood pressure was low and worried the nurses. The doctors told me later that lower-than-normal blood pressure is quite common after surgery since they get you so dehydrated prior to surgery so that very little is in the bladder.
Waking up after surgery was easy although it took me a while to keep my eyes open for very long. But my wife was there and they took care of any pain I had initially. The worst problem was the the bed in recovery was not super comfortable and of course I was so thirsty. The nurse would only let me have occassional ice chips until she knew I wouldn't get sick. I kept trying to convince her that I have an iron stomach, but I guess I was a bit groggy and not too convincing.
So the next day, I was walking (slowly), left the hospital at noon, and was walking at home every day - slowly and around the house at first and then around the neighborhood after that.
The only real pain I had was from the gas afterward, which took a couple of days to clear. (An early message thread said "flatulence is your friend!").