For law school, you would have to finish a BA or BS first.
What is it that you really want? to study at NYU? to study in New York? or to study law?
If you want to study in New York City, there are lots of options besides NYU that you can consider.
If you want to study at NYU as an undergraduate, there are lots of possible major fields of study.
If your long-term goal is to practice law in New York State, NYU is not the only place you could study law.
Since you are in 10th grade, you have lots of time to keep researching your options. Once place to find out about US educational opportunities for international students is http://educationusa.state.gov/undergrad.htm