It is a really good English site and one of the most comprehensive around for going down the rabbit hole in terms of antennas and DIY However England Antenna groups do not apply to Australia.

The channel Numbers do not match our channel numbers. We also do not use any frequencies between 470 – 519 MHz and not above 820 MHz. We have band 4, band 4+ and Band 5 and the least sensitive UHF wideband. There are other differences so read with care but if you have an interest in TV it will keep you going for hours
AERIALS AND TV

If You Get Stuck With Your Install Don’t Hesitate To Seek Some Advice