I went to Japan when I was 19 on a working holiday and had a ball. I was part of a group of Aussies that went over, which made the transition a little easier, but the language and new culture was sometimes overwhelming.
Fortunately you won't have the language problems in Australia. I am sure once you get over the initial change of being in a new country, you will settle down and have a ball.
Hope you have a great year and I am sure you will have many great experiences. I hope you come back and post some of your experiences or if you have any questions about living in Australia.
thanx for your reasurance, im hopfully goign to find my new life away from everything, but if not i suppose i will have a good few stories to tell. im realy looking forward to working for meals, and seeing the country. volenteer work is a big thing for me i would love to doo it. x