Welcome to the sisterhood. Don't despair. Your life is now changed forever, but if you are proactive, you may find your health will be better than it has been with years of eating the "wrong" foods.
I've been diabetic since I turned 55, going on 10 years now, and I'm maintaining well enough that I still haven't had to go on insulin. I simply make sure I walk more (many old injuries keep me from exercising too hard), cut out as many carbohydrates from my diet as possible (this DOES take some effort and self-education), and remind myself between meals to eat only high-fiber, high-protein, no-sugar snacks.
It does help to lose weight, but be aware that diabetes makes that harder to do (especially belly fat) because it makes you insulin resistant, and your body is more likely to store the extra blood sugar as fat instead of burning it in the muscles. So lose as much as you can now, before you have full-blown diabetes. And most people don't know that even thin people can develop diabetes – they have the gene for it, and it will sometimes show up later in life in spite of the best eating and exercise.
And I test my glucose levels religiously. You'll need to get a glucose testing meter if you don't have one already just to make sure you're not getting higher glucose readings than you expect. Regular A1C tests are also important – this is done with a fasting blood draw at the doctor's office.
I strongly recommend getting at least one comprehensive book on Type 2 diabetes. You'll get an overview of ALL important information from a book like The First Year, Type 2 Diabetes (http://www.amazon.com/The-First-Year-Essential-Diagnosed/.... It will teach you how to manage your diet and exercise, use a blood-testing device, and everything you need to know to keep the disease under control and avoid the common side effects that will destroy your quality of life.
For now, make a real commitment to eating fewer high-carb foods. For me, this means pasta, breads, desserts, and most fruit. You can look up low-carb diets on the internet and get loads of information and menu ideas. And don't make the mistake of avoiding exercise because of balky body parts – keep looking until you find exercise you CAN do. Swimming, perhaps? Good luck!