Hi Again!
I would suggest that you research low carb / ketogenic diet, paleo diet, or whole foods diet. Though keto may be better for you as it will directly address insulin resistance, and also avoids sugars, starchy veges, and sweet fruits.
The basics of this diet are:-
Eat adequate healthy proteins. This will mostly be meats of all types, fish, eggs, some nuts, unsweetened protein powders can also be used.