How to revise the case study

Hi tutor,
I’m faced with difficulties in studying F8! Now I start to learn F8, but when study the case I’ve spent much more time than limited and can’t catch up n write the case! When the studying mood is on, it’s tends to divert the required! It’s much funny then.Plz guide me how to study this F8 subject in order to pass in one attempt.P.S I haven’t work for any business since I haven’t graduated! It must be much appreciated sir!