I want to care to learn and be very knowledgeable, where do I start?

The question title is lame, but I love learning, I just don't learn as much as I want to. The internet holds so much knowledge but I don't know where to begin. I just want to read and read until I'm somebody who can share so many ideas and facts. I'd love to share my knowledge with other people to teach them and satisfy their curiousity. I want to expand my vocabulary and develop opinions on various topics like politics and religion. How can I work towards this?