Shaping up to be a cheerleader?

Okay, so i'm going into high school in the fall, and since i missed tryouts for this year, i have to wait until april-mayish. I'm about 5'6-5'7 and weigh around 130-135 pounds. I would love to lose some belly fat, and tone up about everywhere, especially arms and legs, but they barely need any work. What are some cardio exercises i can do? At the moment i babysit Monday-Friday and i do Just Dance 2 with the kid for about an hour every day. Dancing is good right? I might take her out for a 30 minute to an hour walk every couple of days. My diet is fairly well. I try to get 1,200-1,500 calories a day.