Hi, great question. I would take one step at a time, otherwise it can sound very overwhelming. I suggest that you focus on doing well on your high school classes, then be very involved in college and make sure to take all the required pre-med courses (don't worry, you got 4 years for that!). During college, you will also prepare for the MCATs in order to apply for medical school. Then, while in medical school you can explore multiple different specialties and learn about them. This will help you decide which field is better for you. After 4 years of medical school, you will then apply to residency. There are many options of specialty, and even for pediatrics and surgery, there are a variety of "subtypes" of pediatric surgery. For example, are you interested in plastics peds surgery? cardiac peds surgery? orthopedics? You will find out as you advance in your path to become a physician.