"Creative" usually means something that hasn't been done before. If you are doing your HSC in 2025 then you are doing the Preliminary Chemistry course, am I correct?
Without knowing what your depth study is about, I can only make very general comments.
You could construct a physical model.
You could film a field trip to a relevant site.
You could interview somebody who works in a related field.
You could use a computer programming language to make a simulation.
Does any of the above float your boat?