How not be scared or afraid of going through weight loss surgery
First, talk to your program about your fears. They are there to help you feel that this is the best choice for your situation.
Secondly, when I was finally ready to have surgery, I knew that the known trajectory for my health was definitely going to lead to a very poor outcome. I had lost weight before but always gained it back with all sorts of programs and methods. I needed different tools. There are very good studies available now about the different types of bariatric surgery and its safety, how to make it as safe as possible, long-term outcomes, etc. I was more afraid of staying where I was than going forward with surgery. That being said, I did have complications. It wasn't my surgeon's fault or my fault. Sometimes people draw the short straw. You increase your chances of success by following your program's guidelines to make surgery as safe as possible. Many hospitals now have the appropriate equipment for heavier patients whether they do bariatric surgery or not due to changing demographics in patient populations. They won't go forward with the surgery if they think you are unsafe, but I do encourage you to talk about your concerns.
