You have two possible ways

1) Try student VISA for BSN, you may start registration process to be a US Registered Nurse once you get in to US

2) Try finish the registration process from there and get a VISA screen done through CGFNS. You have to pass CGFNS or NCLEX exam from Delhi center, in this route.

It is just very top level description. You may want to surf for detail procedure.

Thanks