Low carb diet (avoiding all added sugars, restricting grains and starchy
vegetables, limited fruits), high healthy fats,
proteins and plenty of non-starchy vegetables.
Exercise daily, at least 30 minutes of aerobic exercise. Add in strength training sessions if you can.
All of these will help.
Get a blood sugar meter and test 2 hours after eating a meal to see if your blood sugar is on target (at least < 140, even better < 120, ideally < 100).