A country I would like to visit

I would like to go to Australia because my relatives lived there for a really long time and I want to know how it was to live there and to learn about the culture that they have in that country. I know that the Koalas and Kanguros are their native animals and that in Sydney is the Sydney Opera House that is one of the most famous buildings in the world. I would like to go to one of the beautiful beaches and learn to surf and dive, also I would like to go to all the amazing and different landscapes that are in Australia, I really like adventure and nature and there people have a lot of choices. I don’t know if I would like to live there because some people say that is a really expensive country and to be honest I think it must be true, maybe I would like to go for a short period of time.