Hey Kessy! You're so lucky I would love to do this so much. :)
I have done a road trip in Australia, and it was a life changing experience for me. I have seen every landscape of the country (snow, beach, desert, forest…), it was my first adventure by myself, I was proud to go there and manage my trip all alone. It made me think a lot about my life in general, and helped me to recenter my personality. Australia is also a very safe place to do this being a young woman by yourself, you can as well very easily find small jobs as a teacher, babysitter… People are very open. I hope that you really enjoy your trip! I will be going to Columbia and Japan next year.