Good luck Fatman2fighter! It's very good that you've got a nutritionist, because it's kind of tricky to eat right in that situation. You probably have a very slow metabolism so you need a strict diet, but on the other hand you really need enough of the right nutrients when you start training.
Oatmeal and rice seem to be very popular carb sources among people who train, which I find a bit strange, as they both have quite a high glycemic index, especially instant oatmeal and rice that has been prepared in a rice cooker.
By the way, may I ask how tall you are?