It takes 8 years to be a lawyer. So the earliest you can be a lawyer is about 26. Then you have to have years of experience as a lawyer before you can be a judge. Once a judge, you start on very petty crimes for years. Maybe you move to your local appeals court after getting some experience. You get noticed one day and you become a state court of appeals judge. Only then would you likely get noticed to make a nomination to the supreme court. You will be no one where near 35.