[AUS] Travelling from Melbourne to Perth for a week in November

Hey /r/frugal.

I am 18 years old and am looking to go on a holiday by myself at the end of the year. Right now JetStar has $109 (each way) tickets from Melbourne to Perth, and I have an airbnb that will cost $360 in total.

I am budgeting myself $40 for food, entertainment, public transport for each night I am there.

I am not hiring a rental car because it's too expensive.

This is the first holiday I am going on by myself. Are there any other expenses I am missing?

Thanks for reading!