I recommend getting a study guide for the text, I used the CGP one if i remember correctly. It will have info on themes, characters and more as well as analysis by act and scene, all of which will enhance your understanding of the text. Also look through the AIC resources that people have posted on TSR. Off the top of my head, the main themes to consider in the text are wealth and power, responsibility, morality and legality, public v private life.
I completely understand your situation, i had a similar problem in Y12 and it sucks.
Hope this is of some help!
Ben