In the overview you begin to give commentary (i.e. "at first it seems a jumbled mess...")

I'd rather stick to describing it -- what it constitutes or tells. 

Worth noting a bit more about who the Walbiri are. Do you quite understand what Dreamtime means? I think it's pretty important; check this out: http://www.aboriginalart.com.au/culture/dreamtime2.html

Here also: https://www.britannica.com/topic/the-Dreaming-Australian-Aboriginal-mythology

There are other maps out there: https://www.aboriginalart.com.au/culture/dreamtime3.html

The key idea seems to be its a conception of the universe that maps religious concepts onto the present landscape -- so that where we are today is also (on another plane) the space of creation, sacred, etc.