Hi Jason,
Welcome to the Stamp Community. Great to have you here.
We have a few other Aussies here, where are you located.
As far as sorting out your stamps goes, I would start by sorting them in to different countries first. Then go to your local library and borrow a stamp catalog, either Stanley Gibbons or Scott's. These catalogs will give you the year, catalog number and value. Any that you have problems with, you can post pics here, someone should be able to help you.
Enjoy and have fun.
Steve


