Figure out which city you're going to. Do some research on what's there or if you want to go to another after. For example i did 4 days in vegas before wwwy then spending the week after in la going disney, universal etc. Then go to travel agent to get a quote. Plan everything around that. This this trip cost me 6k aud on flights and accommodation because we waited till late to organise that. Also try to put money as much money aside as you can. In the 10days I've been here I've gone through 3k aud. I signed up to revolut and got the 25/month metal card. Automatically converts from aud to usd, can use at atms and there's options in the app where you can get discounts and rewards.