I have always wanted to visit Australia. Do you know any good travel advice if I should go?
Well its the biggest country in Oceania and the world's sixth-largest country by total area. SO youll have plenty of spots to visit, May I recommend visiting Sydney first. 
That sounds great! What kind of wildlife would I expect to find?
Around Australia's capital in Canberra you can find lots of Kangaroos and a huge zoo there, and you can even find kangaroos in urban areas in Sydney, Thats why I recommend you go there first.