I think you are here in good old Oz?
Freeview is a collective advertising name for free-to-air stations, as opposed to Pay TV like Foxtel. So if you can already watch Ch 2, 7, 9, 10 etc etc through the STB you are watching Freeview.
About the only thing different in a Freeview STB from any other STB is that they disable any features which allow you to skip the advertising.
If you can't get a picture yet you should hook up the STB to the aerial as shown in the user guide, and then connect the aerial socket of the TV to the STB. Then turn it all on and select "Search" from the Menu on screen.
The STB should then find all clear stations you can get, and arrange them just as in the TV Guides.