I'm not stupid lyrics

What is the message for me? I don't understand nothing Speak all, speak something I don't understand this Speak, only speak Don't scream I'm not stupid I have a idea [chorus] I don't know why But in all my life Nothing is right Hey wait, speak with me Why I care? No, I don't care I'm not stupid I have a idea Speak, only speak Don't scream You know I'm right No, I don't care