Which source for past papers as a Year 11 student?

I am not quite sure about the best source of past papers sorted by topic.

Some people say VCAA, but there are many topics merged into one question which makes it quite difficult.

some say StudyClix, but I did not find enough questions there for the premium version.

Some say checkpoints, I asked my teacher and she said this should be for year 12 students.

Some say THLC, but I am worried the HSC curriculum differs from the VCE curriculum.

So what would you advise me?