If you are driving in Sydney, or across NSW, and your driver licence is not in English you will need an official translation. If you do not have a valid license, you are risking a large fine and may not be covered by insurance.
Normally, you will need translation services if you hold a temporary visa. You do not need to get to get a Victorian driver licence and/or learner permit. You can drive using your current overseas driver licence for the length of your stay, BUT the driver licence must be written in English or accompanied by an English translation. That is where we can help.
If you hold a permanent visa, then there are different rules.