I live in Tasmania and have been meaning to find an edible field guide to mushrooms or some such. Mushrooms here in Launceston are frequently popping out of the ground in my front and backyard and on the grass verges by the road, and if you walk anyway in the national parks and state forests you're up to your knees in mushrooms.
Would love to know if any of them are edible.
You need an identification guide for your area (Tasmania, or perhaps all of Australia). Unless you can safely identify the species, you cannot be sure it is safe to eat, and should discard it. Identification is usually done using a dichotomous key, which involves checking for the presence or absence of a characteristic (which involves understanding some jargon), then another, until you're down to genus level. Then you check visually to identify the species. It's a bit like an expert system, except printed in a book.
In some countries in continental Europe, you can take wild mushrooms to a pharmacist for identification.
Better than just an identification guide ...