If you really don’t have anything metal in your house (metal sinks or any appliance with an outer metal shell that should be grounded), grab an extension cord, cut it and completely remove any cable that is not the yellow and geeen one, that is the earth cable (assuming in Australia that is the correct color scheme), expose that wire and touch it to discharge. Make sure the other cables are in no way exposed. If yoy want to be extra safe, buy a plug and only connect the earth cable.
/s of course, don’t do that unless you know your way around AC power