When Does It End?

15 years old, and I am already praying for early retirment. I've already started saving up. Sophmore year in high school is such a bitch. Sometimes, I honestly feel like giving up, but I know I can't. My dreams are way to ambitious for me to just throw away. My grades are all really low, and it seems like I can't do anything about it. Hopefully things get  better soon.