It is always better to hear the Nyungar (Noongar) language than to read it. Here are some interesting and useful resources.
Mayakeniny: Noongar language and performance resources
The Wirlomin Noongar Language and Stories Project
‘Illustrated Dictionary of the South-West Aboriginal Language’ (1996) by Wilfred Douglas
‘Noongar Dictionary: Noongar to English and English to Noongar’ (1992) by Rose Whitehurst