That's great. We always need more pediatricians. Kids can be challenging to work with but treating them is very gratifying. It's a long road to become a pediatrician including (after high school) 4 yrs of college, 4 years of medical school and 3 years of residency. Some doctors do even more training afterwards to specialize in a particular area of taking care of kids. Right now focus on getting the best possible grades that you can and also "shadow" a local pediatric doctor in your community.