After you have submitted your application to IU, the Office of International Services (OIS) will contact you for the documentation required to create a DS-2019 immigration form. You will use this form to apply for a J-1 visa at the U.S. embassy or consulate in your home country. More information about visas can be found on the OIS website.
Please note that the U.S. embassy or consulate has the right to grant or deny a visa, and that specific questions about the timeline, process, and results should be directed to the U.S. consular section.