Your bike's fine. You might consider your position. Sometimes bikes like that are set up a little upright. So I'd look at the drop from the seat to the bars, but if it's not what you want for racing, thats as easy as moving some spacers.
If you want to spend any money, I'd buy a nicer set of wheels. Nothing wrong with the wheels you have, but its helpful if you're going to race to have a spare set of wheels. So you can buy a nice set of race day wheels, and use your crrent wheels for training, and the spares for the wheelpit when you race. But you don't actually need to buy or do anything. Your bike stock will be just fine to race.