It's a mistake to get too narrow too fast. Kids today, many of them will live past 100, and you cant predict what you might work on. The things you're passionate about and interested in, get experience with them by going deep on projects. I would encourage science projects, plays. Pursue science, math, writing, history - the 21st century demands a lot of cross-disciplinary thinking.
While Max appears to greatly admire Wallace as a writer and feel compassion for him as a man, he is never starry-eyed, or pulls his punches. Every Love Story is a Ghost Story is as illuminating, multifaceted, and serious an estimation of David Foster Wallace's life and work as we can hope to find.