In the pause: What would you tell your 13-year-old self?

Today I’m writing the Author’s Note for my book and I’m framing it as a letter to young adults to explain why I wrote the book. It’s akin to the idea of writing a letter to my younger self, specifically my 13-year-old self since my protagonist, Emerson Page, is 13 in the book. If you could give your 13-year-old self advice, what would you say?