What you got is a really nice bike, and after you ride this one and learn things you may want to swap out anyway. I think you did well.
Go get the latest book by Covert Bailey- he's the biochemist who did the actual work that all the current nutitional wisdom is based on. Yeah, you'll need more carbs, the issue is what kind. Eat your spinach, it's all long chain carbs. Eat red meat, you'll need the protein to recover and make new muscle. You'll also find that good quality beer is an excellent training food of champions. I'm totally serious, all those Olympic athletes can't be wrong And it's medium chain carbs. Even gummi bears have a place as short chain carbs- also called Gatorade. You need to do enough calories if you go to high mileage training. A severely restricted diet will screw with bone density and muscle develpoment. And you'll poop out and get dropped.
Atkins has a place, but endurance athletes suck carbs like crazy. Baileys fit-or-fat explanation of metabolism is the best, and easiest to live with. You need a better understanding of what a carbohydrate is (almost everything) and how different ones work. How much carb you need is a function of how far and how hard you go.
His books are all over the place. The latest one is called "Smart Exercise"

missliz