Hi Gowtham,
There is no one specific way to becoming an assistant director in the industry. For an entry, you can start from the below-mentioned way -
If you are a student in any media college - many internship opportunities will come your way from the college program itself in forms of competitions that will result in internships or through your course coordinators and professors who are very well connected to the industry. Otherwise, if you have guest lecturers who work in the industry, it always helps to get in touch with them for internships and recommendations. Once you get an introduction then it's up to you to climb up the ladder with your performance.
Good Luck!
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile