Kaj, It's OK to be nervous. I have to tell you that this surgery is one of the best things I ever did for myself in my whole life. It gave me back my health. I didn't have anxiety issues until I was two years past surgery, and still do. My doc has tried different anti-depressants, and an anxiety drug. Though my angst is better, it is still pretty bad sometimes. It didn't start until I sort of had some PTSD from a terrible job I had.
My only regret about my gastric sleeve is that I didn't do it when I was much younger--I was 58 before I could have it done. But better late than never! I wish you the very best in your new journey, and way of life!