Hi Hizam, I think you have trouble understanding the use of the word "would" in this sentence. We use this word to talk about an unreal situation. for example, the sentence you asked about could be the answer to the following question, where would you go if you could choose a place to live in? so this is unreal in this situation because the person is not actually able to choose to live anywhere they like. I hope you understand what it means now.

Hello Hizam! It would really depend on the context; is this for a vacation or to relocate or to study? As is the sentence means that the person (subject) is expressing the inclination to go to Australia and given the opportunity, the speaker would go to Australia. But it could also be someone advising someone else to go to Australia and that person is actually saying: "If I were you I would go to Australia". I hope that helps!

I would like to go to AUstralia.

The speaker here is “I” and the sentence refers to “I(the speaker) will visit Australia.”