don't stress out too much about it now, there are people in my grade that used to get 30% in lyk every test and did 0 hrs of studying in yr10, now they are top 10 in grade in pretty much every subject in yr11....and they do 3hrs of studyin everyday =) its not so hard to turn from dunce to class ace =P
its yr12 that rillay counts, study habits are most important in yr11 ~ even if u fail most subjects, people don't really shine until yr12. xD
i would sey too late to get UAI of 95...is to start studying 1wk b4 HSC lol =)