>read lots of real books. Go to the library and study with real books even (especially) if it takes longer.

Talk to lots of humans too. Friendships would be a nice bonus, but your real goal is to prepare for the next step after high school. Because no one else will prepare you.

College, job, trade school, military: networking will be more important than ever in a world where any non-verbal communication will have scrutiny behind it. You don't need to be a social butterfly, but get really comfortable holding conversations and listening (or at least, pretending to listen) to others' experiences. That's increasingly becoming the only way to truly stand out if you don't already own capital. We're increasingly moving away from the world where a high INT stat can carry you through life like my generation.