We will be here for you thru the learning process so things should go fine for you. Sounds like you are right on track and Yes, it can be managed very well by some people with diet and exercise. One thing I would recommend though... It's one of your good things... which really isn't so good...
You should get yourself a monitor and test your sugar at least once a week in the morning before breakfast just to be sure you are staying on track. A monitor should be covered by your insurance and is definitely worth having. One of our other forum members said something the other day in a post that says it all... "If it isn't measured it isn't managed!" He was referring to a food/exercise journal, measuring portions and recording blood glucose readings. I was where you are about 10 years ago and I wish I had been more aggressive in monitoring my sugars. My doc at the time was very unconcerned about how often I tested, just made me come in every 6 months for a blood test... Because I couldn't see the numbers I was getting it was easy to play ostrich and just ignore the fact that I had diabetes.
I'm now on glucophage, 1000 mg twice a day, Avandia, 2 mg. twice a day and Lantus insulin, 15 units each night. By the time my numbers got bad I was in total denial and hadn't used my time to find out what foods triggered my worst spikes. I've had vision changes, had to get glasses, have beginning kidney disease, have lost 4 toenails to chronic infections that wouldn't clear up because of poor circulation from diabetes... and I have neuropathy in my hands and feet. If I had been faced with those spiking numbers when I was misbehaving I would have paid a lot more attention to my food/exercise plan. I AM doing that now but I can't go back and undo the damage.
Unfortunately diabetes Type2 is a progressive disease and very difficult to stop. Knowing your numbers will give you a definite advantage in slowing the progress waaaaay down and possibly prevent you having to go through very many complications. I'm not trying to be all doom and gloom here... just want to give you the benefit of my bad experience so you don't have to go through it, too. Hope this helps.
"People are like stained glass windows: They sparkle and shine when the sun's out, but when the darkness sets in, their true beauty is revealed only if there is light within."
- Elizabeth Kubler-Ross