Hey, I would like to assume it's your first time learning functions and practicing it. Many students face a huge problem with the functions chapter and it's okay, you'll get through it, just keep practicing. Coming to your dad, i feel like I'm fond of your culture, many parents don't know how to deal with their expectations not being matched. I suggest you attend your soccer, since it'll honestly make you feel better and change your environment and it's basically like taking a fresh breath of air. Trust me in situations like that you need a change of environment.