As you stated, "When I get into college, I plan to be as active as I can in local politics". Procrastination is an enemy,along with Apathy. Starting now will help you gain more confidence in approaching others concerning the events of the day, and how to educate them on other options of how things could be. The hardest thing to do is to get people to "Think Critically", to weigh the Pros and Cons of every situation, and how it effects others. We are in the beginnings of an Intellectual Revolution.
"Never be afraid to raise your voice for honesty and truth and compassion against injustice and lying and greed. If people all over the world...would do this, it would change the earth. "
— William Faulkner