One line for each idea, in order.
You can hold about eleven minutes before you reach for something. Is that a limit or a measurement? You have named a classmate as the person you are racing. Who is actually taking your hours? You keep meaning to practise and keep not practising. What should you measure before blaming yourself? Your friends are kind and none of them study. What is being transmitted, and what is the fix that is not cutting them off? Somebody at home offers to take the cooking for six months. Is that a favour or a term? Your habit is scheduled for evenings, when you can. Rewrite it.