Law: what should a new student do before entering 1st year??

2 years? Safe to assume you are just doing the core subjects. You've likely done a degree before hand so it's safe to assume you have sufficient writing skills. I personally recommend giving 2-3 textbooks a read - something like contract, land and equity. After reading them or while you are doing it they will make references to cases. You should try giving cases a read as they are quite difficult at first, but after a few times reading them you become more proficient at it. Then give some essays a try.

Edit: also read a legal system book - something like the legal skills book. This isn't very difficult though, just outline some basics which are good to know.