Well, AQA have 3 specific categories of which two are chosen by your school. In each category there are two different tasks, and your school must choose one task from each of the two categories they chose. The categories are:
Moving Images, Re-creations and Commissions.This year my school chose Moving Images and Re-creations. Generally, the tasks are very similar in these two categories, but they can change. In Moving Images, for the past few years, the task has been to write about TV shows, adverts, films etc. that you love or loathe, and with the re-creations you have to use poems as the basis of a piece of creative writing - so not that difficult.
Are you in Year 9? If so, I would strongly advise you to attempt some of the tasks in the Specimen Task Bank, available on AQA's website, and look over it to see how you can improve. Feel free to attempt some tasks, and then send them to me to have a look at - obviously, I am not a professional, but I should be able to give you some constructive feedback. What you also might want to consider is wider-reading - find out what books you'll be studying throughout the course - this is great if you're doing Lit. - and try to get a head-start by reading them. Not only will this give you a head start, but it will help your Creative Writing, as you'll learn new vocabulary and sentence structures that you can use to really impress your examiner.
Anyways, if you have anymore questions that you'd like to ask me, feel free to do so.
Good luck!