What is the first step to CCNA? I'm in high school but I figured since I'm going to for sure be the world's best network architect the world will ever see, maybe I should start now?

Anyways, what do I do? I downloaded GNS3, but I haven't explored much yet. Is there some book series I should buy? I haven't worked a day in IT so I have know idea what to do to get networking knowledge.