When I started uni I was exactly the same - I had never cooked for myself, the most I could do was pour a jar of sauce onto some pasta, it was ridiculous. My mum gave me the cookbook Nosh For Students as a going away gift and I'd definitely recommend it to anyone moving away from home that's never really cooked before: the meals are fun and cheap and relatively easy to make, and the measurements are all in 'mugs' and spoons so you don't even have to invest in scales. There's also a section at the start with the basics of cooking, with things like a chart explaining how long each vegetable takes to boil/roast, how to roast a whole chicken successfully, how to portion pasta and how long different types take to cook, ideas for sandwich fillings etc. Seriously, that book was like my bible for the first year of university