I'm probably going to be pretty biased because I go to a chemistry tutor, but I love the subject. But in school, the teachers do teach a bit too slowly, and I actually do feel screwed for my chemistry exam despite having learnt all the content already in tutor. The teachers at my school don't teach as thoroughly as they do at my tutor. Nonetheless, I'm finding preliminary chemistry really easy at the moment (at school that is), but the concepts are hard to sink in at first especially if you're completely new to the module. My school just finished module 1, the chemical earth, at my tutor we just started module 3, water. So long as you do the homework, and spend perhaps a couple of hours studying each module once you've finished it, you'll be fine!
Edit: Just saw the post/reply above. I go to Peak Science, and I go to Hurlstone. Yes, it's dominated by HAHS, MFHS, and Sefton mainly. Though you do see a couple of Syd Girls/Boys + Ruse people, Tempe, Fort Street etc.
I realise this is late lol and the person asking about a chem tutor might already go to Peak, but I recommend it so much. I only started last year (which was when we started module 1) and I love it, haha! There's a Monday/Saturday/Sunday class. I go to Sunday, best teacher ever!