C.R.
I was just diagnosed with diabetes in March of this year. When I first went to the doctor, I was having symptoms of diabetes (my father and cousin both have it) so went in specifically to get checked. Was actually over 500 (don't know exact number because the meter doesn't read higher than that!) and it took two insulin shots to get it down below 500. That was a scary night.
However, I actually did not get much information or instruction from my doctor and wasn't even scheduled to see the nutritionist, doctor, or eye doctor for about two more weeks after that. The doctor did prescribe medication and a glucometer but did not really give any instruction or description of what they did or how they worked; not even anything about diet really except no sugar, avoid carbs.
Basically, you should go online and go to the library and pick up as much information on diabetes and diabetic diets as you can and do your own research. You do want your blood sugar levels to be around 90, definitely below 100 for your fasting reading (12 hours of fasting so you would take this number in the morning). Your after meal readings would be best to stay around 120 or even 130, for some it could even be higher but you should ask your doctor what he would want yours to be at ideally. My doctor has had me (from the beginning) testing twice a day, but I did it maybe 4 or 5 times a day for the first month just to get a good handle on what my readings were throughout the day and how what I ate affected them. Since then, I've just tested radomly when I think I should or if I haven't checked it at least once that day.
The best thing you can do as far as immediate changes are just to start getting some kind of exercise (about half an hour a day of walking would really do the job), cut out all sugar and watch your carbs. Simple switches like whole wheat bread instead of white bread, being aware of portion sizes (especially with things like milk and juice which have a lot of sugar in them), making sure you are having breakfast, lunch, and dinner as well as snacks in between to keep your blood sugar levels balanced (because letting your sugar drop to low is dangerous too), and even avoiding certain things at certain times of days i.e. try to have fruit in the afternoon instead of the morning...oh and always look for high fiber foods and add protein to your meals/snacks.
I was diagnosed in March, was placed on medications, complete diet change, and new exercise routine. It's been about 5 months now and I've been off the medication for about a month and controlling my blood sugar with diet and exercise! It's definitely hard at first figuring out what you could have and not being able to have things you want, but you'll get through it and I know you'll be healthier and feel better, too. Your new diet would also be beneficial to your family (especially kids) and could prevent any possible health problems for them-and worse health problems for you-in the future. Good luck!!