I understand your concern. I eat very few grains (except for oatmeal) and the only bread that I occasionally eat is whote wheat sourdough with cranberries and walnuts. But here is more information that might change your mind about a keto diet:
https://nutritionfacts.org/video/does-a-ketogenic-diet-help-diabetes-or-make-it-worse/
https://nutritionfacts.org/video/plant-based-diets-for-diabetes/
Dr. Greger offers a lot more information on the subject. Note that I am not a vegan, but more of a whole-foods pegan that eats very little animal protein. And, of course, maintaining ideal body weight is critical in preventing diabetes. Eating more fiber is my solution to weight control--it fills you up fast! Good luck with your journey.