請幫我改正一句英文句子 - 旅遊

我20歲的目標是到澳洲自助旅行
My goal at 20 years old is becoming a backpacker to travel in Australia.
這樣對嗎？幫我改正一下
My goal is to backpack in Australia before I turn 21.
2015-03-05 12:03:52 補充：
> 如果請別人拍照用橫的拍要怎麼說?
照片,直的叫做portrait.橫的叫做landscape.所以你的原句要翻成:
Could you take it (our picture) in landscape.

My goal is to go backpacking (=ruck-sack) to travel (on holiday) in Australia at 20 years old.
the horizontal position
(=not vertical)