<p>Please don’t worry about your grammar. You’ll find Americans of all classes, young and old, are rather sloppy in their speech and use many expressions that butcher the language. Your accent will be charming to us, and will probably help open some social doors.
I’d be more worried about getting into the places you’re interested in, as they’re tough for international students. Good luck, though. You’ll find valuable information on this forum.</p>