There is not one thing you are meant to know before you are meant to know it. There is no short-cut to growing up. And even if there was, you would find that later on in life, you'd pay for that many times over. You already understand kindness and empathy and work ethic. That is a good start because they are sturdy and important and foundational. They are also simple--and when everything else falls away, they alone will make you rich.
Beyond that I'll say this: take Excedrin for headaches, wear sunscreen, and always (ALWAYS) finish a course of antibiotics. But that's it. That's all I've got for you. Because everything else you need to learn on your own. And it'll be how you learn it that will shape the woman you'll become.
Just keep showing up--even, and especially when, it's most uncomfortable. You can't plot the future, but you sure as hell can enjoy the ride.