I am not a physician and it's always best to consult your health care provider before starting a diet. However, I would personally suggest a 'diabetic diet.' A diabetic diet simply helps control your blood sugar and help prevent "spikes" by knowing the types of foods you are eating. If you eat simple carbs, or sugary, startchy foods, your body will digest these very quickly. This results in a blood sugar spike. There are several websites that can help you plan your diet accordingly. You will need to watch the amount of carbs, sugars, and starches that you eating. You don't have to cut everything out, just keep it within moderation and adding simple changes. Such as drinking diet soda instead of regular. Replacing table sugar with things such as Splenda (artifical sweetener). I will post a few websites that help you learn more about a diabetic diet and how to plan a diabetic diet.
As far as your foot goes, it is very important to take very good care of your feet. Diabetes can cause poor circulation, nerve damage, and very poor healing. You need to inspect your feet daily, wash them in lukewarm water, wear comfortable shoes that do not rub, wear DRY socks (anything to avoid blisters), and also wear socks at night to prevent your feet from getting cold. I will post a website that may help you with that as well.
http://www.diabetes.org/food-and-fitness/food/ - this helps you learn about the foods you're eating and how to plan a diet
http://www.mayoclinic.com/health/diabetes-diet/DA0... explains the importance of a diabet diet and more about creating your diet plan
http://www.foothealthfacts.org/footankleinfo/diabe... - diabetic foot care guideline
Hope that helps!