You might find some of Dr. Dansinger's articles very helpful.
Ask your doctor they could recommend a dietitian that could sit down with you and talk about the foods that would be good to have as a diabetic.
Mostly stay away from "white" types of foods, like breads, pasta, rice, potatoes, and buy whole grain bread, whole wheat pasta, and brown rice. I would limit these as much as you can though and mostly go for big salads with chicken, tuna, or other fixings. For breakfast I always make sure I have protein, like an egg, and a slice of whole grain bread. People eat all kinds of things for breakfast.
Eat many different vegetables, salad fixings, protein, such as eggs, fish, white meat chicken, lean pieces of beef, veal, lamb, or go more towards lentils, beans, and nuts for protein.
Some people on here are vegetarian and really believe in that way of eating.
Try not to eat fruit like bananas, pineapples, dried fruit(raisins, etc.) as they will bring your blood sugar up more. I limit my fruit as it spikes me. I'm not on medicine, and doing this by diet and exercise along. I eat 1/2 an apple and nuts for a snack(walnuts or almonds(less fat) are the best). Don't drink juices. Stick to water, coffee, (I use decaf), diet drinks. Sodas are not the best thing to drink though. There are some sugarless drinks out there.
Some people like to eat more smaller meals. Some eat three times a day(smaller meals) with little snacks in between. That's me.
Check on Calorie King.Com for carb levels of foods you're eating. Read the labels when you buy things at the market and look at the total carbs in what you're buying.
Make sure you get in exercise every day. Check your blood sugar levels, though, as type I's have to be more careful. You might want to keep some glucose tablets or OJ for when you go lower in blood sugar levels. You might want to check two hours after you eat to see how your bs levels are doing. Try to keep them under 140. I think Gomer, who is type I said it could be higher. I don't know a lot about type I diabetes. There is another site, not WebMD. Maybe one of the other type I posters can put that out here for you to check.
Make your protein, the size of your fist, and fill up your plate with other things. I "do" have a small red potato at times with dinner.
Good luck! I'm sure others will give advice.