work on weekends. once you hit 18, and have no job experience, you will struggle to find a JOB!!! unless you have connections.
i've been working since yr10 (after work experience, at coles). I dont work that often. sometimes on sat and sundays, but mostly just on sundays because they have x1.5 pay.
when exam time comes along, just make sure you let your supervisor know that you want some time off.. make sure if you tell your supervisor first before anyone else does. haha. because if you tell your supervisor after everyone else has, then the chances of your supervisor letting you have a few weeks off to study decreases. because in most retailers, casuals (students) work on weekends.