I know someone who runs foraging courses, including mushrooming. There is a rhyme to help remember what to avoid. Of course I can't recall the whole thing right now.
I lived in Wollongong for my Uni days and somewhat beyond. Dangerous critters are unlikely. Boredom is a possibility. It's not a slow country town but it certainly isn't a City either. BIG bands don't play there, indie hits do. A car isn't necessary, depending of course on his type of work. You can commute to Sydney by train but it's brutal.
Not sure from your 'native' wording if his beloved is just Australian or of Indigenous heritage. There are some volatile sociopolitical issues with the latter. Wollongong is an old Steel town, it leans Left and Union, but is far from perfect.
TMI attempted a nasal saline rinse. Not as bad as feared. Will it prove helpful or hoccum remains to be smelt