An open attitude towards this very varied (generalist), interdisciplinary programme is the most important thing. You will be drawing sketches, developing designs, writing film scripts and working with algorithms and software programs. You will be dealing with topics as diverse as design and aesthetics, and the marketing of media products.
No, that is really not necessary. You don't have to be a mathematical genius to get through this programme. However, you shouldn't absolutely hate maths either because in your foundation level studies alone, you have 6 SWS of maths which lay the foundations that you will need for your advanced level studies. You should have a basic logical/mathematical aptitude.