Welcome to the Forum!
I am sorry to hear of your son's diagnosis.
Welcome to the world of diabetes. I have been exactly where you are at, my son was diagnosed at 10. Read and learn all that you can on your son's condition. Self education is one of the keys to dealing with this beast. Carb counting, and bolus insulin injections for the carbs, WORKS! Find a endocrinologist, diabetes educator and a nutritionist that will work with you as your "Diabetes Team". Good luck and let us know how it goes. I wish you and your son the best!