My godmother had her pancreas (as well as her gallbladder and duodenum) completely removed. Insulin therapy is practically the same as what I do with my type 1 diabetes, and she also takes enzymes. She was very depressed about this for several months, but then she returned to her normal state. In general, it seems to me that people's psyche is quite stable and returns to its usual state after almost any event.
In fact, it's not very difficult to always carry a syringe and sugar with you, and the amount of carbohydrates in your favorite foods is quickly remembered.
If you have the opportunity to take a DAFNE course (to Google the principles, the difference between insulins, etc.) before starting insulin therapy, do it, because it will greatly help in understanding how insulin therapy works. At first it seems a little difficult, but then you understand how to do it (I learned it at the age of 8, so I can assure you that even an elementary school student can handle it)
Although diabetes is really rich in complications, it takes decades for them to develop, so it's unlikely that you'll experience diabetes complications in the next 10 years.
The decision about surgery is not urgent, so you have time to think about which option is more comfortable for you. talk to your doctor about the risks, think about whether you want to do this, because none of the options is the life of a completely healthy person. You can draw a Descartes square and think about the pros and cons of each option.