It is very normal to be scared or nervous. I was at first but then the day of my surgery came and I was completely relaxed. You've got to come to the determination that you are doing it for you and to extend your life. I had my surgery on March 15th and feel completely amazing. Since I've started through the program, I've lost a total of 42 pounds.
You can do it to...just remember to do exactly what the doctors tell you to do. The biggest change is to take small bites at a time and to chew, chew, chew.
Good luck!