please anyone, answer this, what steps should I take to minimize the problem?

I received a 15km ticket about 6 months ago, otherwise clean driving record for 3 years.

I was charged at 1am, and no workers were present.

I did not outright admit guilt, I apologized and simply complied with the officer. I handed the insurance and driver license but was nervous and couldnt find the ownership form, although I had it in the car. I also had my license set for renewal in a month but he didnt insist on the detail.

What course of action is recommended to reduce the fine/lower the demerit points? Should I go for early resolution or simply select the trial option?