I want to apply to PHD program in USA. and I cannot come back to my country.
I need to know whether I would able to change my J2 visa to F1?
If I can, (after receiving I-20 form) should I leave U.S.A and request
a F1 visa from third country , and then come back to U.S.A again?
Does it take a long time and it is a difficult process?
Thank you so much in advance.