Given this information, you seem to be on track with an ATAR in the low 90's range. More specifically, that would be an ATAR of approximately 92. Your position across your subjects appears favourable. This is especially the case of Chemistry, Design and Technology as well as Investigating Science, in which you are ranked first. This means that, should you maintain this optimal rank in these subjects, you will maximise your Assessment Mark in each subject. Additionally, if you also achieve the highest Examination Mark in each subject, there will essentially be no limit to the overall HSC mark that you receive for each subject. This gives you a great opportunity to perform at a standard that can exceed this estimate.
Your position also seems favourable in Mathematics Standard and Biology, although to a slightly lower extent than the aforementioned subjects. Therefore, if you have not yet sat your trial exams, you should do your utmost to prepare and perform well in order to maintain (and if possible, improve) your ranks, placing you in a comfortable position as you approach your HSC exams.
On the other hand, English Advanced is your lowest-performing subject. Because of this, you may need to allocate more study time and be more diligent in your preparations for your trial exam (if you have not yet sat it) as it will be your final opportunity to improve your rank in this subject. Further, the HSC exam is very important given its 50% weighting and hence favourable performance will allow you to receive a higher overall HSC mark.
I hope this helps!