Hey Shruti, In India once your interview is over, it takes about 2 weeks for you to get your Visa in hand. Just to be on the safe side, you should reserve a Visa interview appointment as soon as possible since the scheduling could take a few days to a couple of weeks. Therefore in total you must reserve at least a month for your Visa process. If you need any guidance take a look at this blog about How to get a student visa for USA https://ischoolconnect.com/blog/getting-usa-f1-student-visa/