Keep your grades up. My guess is that free tuition is going to attract new applications, and admissions might get a little tougher over your high school years.
Working over summers to build a nest egg in high school is a great strategy. That way you won’t have to work long hours while in college which can make it harder to get the most out of your experience.
When you get to junior year, you can run the Net Price Calculators on college websites to see if you will qualify for aid at other schools as well. It’s not likely to be any good at NYU, but over time you can learn about other colleges.