f2和申请之间没有联系, F-2 is just a kind of visa. F-1 is student visa, F-2 is the dependent of F-1 student, usually spouse-- 陪读. You can apply for schools, but have to change visa status from F-2 to F-1 before you can enroll to study. The application process is totally the same with anyone else, except that the communication might be convenient since you are in US.