Hey all, so I am planning on traveling to Australia sometime this year. I havent traveled before and am unsure whether I will continue traveling frequently after. What would be the best way to go about it financially? I have read that it is advised to have 2 cards, one for airfare and another for out of country transactions (forex and all). Is it even worthwile to go about opening new cards if I most likely wont travel much afterwards? Any and all tips are welcome!

Edit: I would also be traveling within Australia which could possibly make use of more miles?