When hiring a full time employee for a newsagents I encourage newsagents to consider doing so with a documented probation period. This gives you the opportunity to not continue with full time employment should the employee not work out. It offers a framework through which you can deal with a new employee who does not work out.
If you hire a full time employee without a probation period you risk not having access to a mechanism for easily removing someone who quickly turns out to not be ideal for the role.
The Fairwork website has more on this including sample letters. Hiring with a probation period is easy as long as you follow some simple rules.