Read the fine print
Be sure to read the relevant Product Disclosure Statement (PDS) carefully before you decide the right policy for you. New drivers should be aware of the Age Excess, which can be charged on top of the basic excess for drivers under 25, and the Inexperienced Driver Excess, also charged on top of the basic excess for drivers over 25 who have not held an Australian drivers licence for at least two years.
Also, it's important to inform your insurer of modifications - or better, avoid them altogether - as this may lead to your claim being rejected.
Finally, keep in mind that car insurers generally will not pay out for damage caused by drunk driving, racing or other illegal activity.