STUDY HARD. No matter if it seems impossible. No matter if it takes time. Wake up early and start studying for your future. Just remember that the feeling of success is the best feeling in the world.
Fun doesn't have to mean 'drinking, partying, and socializing.' Fun can be a night alone, getting lost in a book, a deep conversation, a walk, creating art, playing music, eating your favorite meal, or doing your work. Fun is yours, you can define it.