don't stress - it gets easier
if you can get a hold of past questions & do some practice essays and get your teacher to mark them...this pulled up my marks quite a lot but is something you will probably do down the track closer to the trials.
a) What historians are you focussing on for section 1?
b) what's your case study?
if my notes are relevant I'll send them to you. I got 43 for extension so they can't have been to shoddy