i've doing the same course as you, for the coursework we studied two comedies (the importance of being earnest and twelfth night, one had to be shakespeare) and had to write an essay on each one which made up the coursework.
for the exam i did the kite runner, great gatsby and poetry by auden and browning. it's a step up from gcse but not massive, practice all the questions you possibly can especially under the time limit. as everyone else has said know your texts as well as possible, my teacher had us memorise page numbers of certain ley events so for gatsby we knew the numbers for the parties etc.
it's a really great course and once you know the exam technique and tick all the boxes you'll be fine! :-)