Start here: go to the US State Department website or the official ESTA site. Do not use random third-party sites that charge you $200 for a free form. That’s like paying a guy to breathe for you.
If you’re from a visa-waiver country, apply for an ESTA at least a week before your flight. If you need a visa, book your interview months in advance—slots fill up faster than Taylor Swift tickets.
And finally, remember: the US is huge, weird, and wonderful. You deserve to see it without stress. So check the rules, pack your patience, and get ready for a trip you’ll be talking about for years. Just double-check that visa first—future you will be so grateful.