Just my opinion, but if I were you I would probably finish those notes because yr 11 stuff is also tested on the HSC. From the teachers at my school they say it makes up around 40% of the HSC so that's my thoughts. I hope it helped?
whoops sorry, i meant that my school isn't in the top 150 but the highest atar for 2019 at my school was 91.10 so idk if that is considered good cause I am losing hope cause that is way below what i am aiming to achieve