Legal Studies can be a tough subject for some people due to the level of content that is required; especially in essays or exams. One thing you need to learn is to be able to fill a booklet completely with legal terms and definitions in relation to your case study. It doesn't necessarily need to be in a perfect essay form, but it does need to flow into each other to enforce a full argument. I personally learnt that not including certain cases or not relating them towards the question was throwing away easy points.
Year 11 legal studies feels a little cruisy, and some people will tell you it is, but if you don't understand a lot of the stuff you do, or don't remember some of the cases you can really struggle, especially in an exam scenario. If you do get the chance in your class, or even in your own time, study things like the Anti-terrorism act in relation to the erosion of human rights, understand the structure and layout of the UN, and some of its international bodies such as the ICJ, ICC, Security Council and most of the international conventions and instruments, especially things such as ICCPR, ICESCR, UDHR, Geneva Convention. Most of these things not only deepens your understanding of the theory, but these can be vital in the HSC exam if the question pops up.
My last tip would be do not get thrown off by the questions, especially the HSC questions. They tend to be very broad, and inspecific into what they actually want you to write. Use it to your advantage; having such a broad question allows you to get more points by including more information and case studies in relation to the question. You rarely will ever get marked down for including irrelevant material if the question is very broad.
By the way, I got all of these tips from a HSC Senior Marker, and they definately helped me a lot.
Good luck for the rest of the year! Hoped some of this info helped...