Guys what are the first step someone could take on losing weight??

Cut off an arm? Okay, I am doing a diet for diabetes, low carb and fairly high in protein (basically a keto diet). I can have pretty much all of the meat I want but I can't have bread, chips, pasta, potatoes, breaded meats or veggies. Very difficult as a truck driver as I get most of my food from fast food joints. I absolutely hate paying full price to get half a sandwich and Subway is a joke they actually charge 2-3 dollars extra to NOT give me any bread.