Study your body like you would a machine or a program or a puzzle. Understand how your muscles respond to stimuli. Figure out how your nerves transmit intensity. Discover what forces your body to move against your will. Given your submersion in the hormonal hilarity that is puberty, you're going to spend a lot of time on autopilot, so step back and observe your body being commanded by primal forces.

Once you build this map, you can begin to monitor and track how external factors drive you. Memes, TV, movies, music, conversation... all signals designed to persuade and hijack your behavior. Spending time here will give you much needed clarity of self and begin laying the foundation of empathy for others.

Friends appear once you have this map as you will have unintentionally filtered out those who will exploit the unexplored regions of you.

Good luck.