Hi Akanksha, Since you say you want to particularly take up Documentary Filmmaking, Sri Aurobindo Centre for Arts & Communication (SACAC), New Delhi offers a Diploma called the Creative Documentary Course. The minimum age of eligibility is 20 years, Graduates preferred. Admission is based on an aptitude test followed by an interview.
Check more details on the admission procedure from the institute's website http://www.sac.ac.in/admission-process
This is the contact number for enquiries for this course +918800444836

Hi

Film Making course is a crucial specialisation under the array of mass communication. The course teaches students how to analyse and interpret cinematic art from diverse perspectives. During the filmmaking course, students develop skills in critical thinking, technical analysis, research and expression, as well as an assessment of the merit of films. See documentary is a type of film, but with different requirements. The basic factors of filmmaking like script, camera, aesthetics etc are all required for making a documentary as well, but they differ in terms of technicalities. In short, the word Films, includes short films, telefilms, series, and Documentary. So if you wish to become a Documentary Director in future you have to study filmmaking only. Apparently, the documentary is a form of filmmaking.

The basic eligibility for an undergraduate programme is a pass HSC certificate. Eligibility criteria for PG programmes is a bachelors degree from a recognised university/institute in any the discipline. Candidates must have a knack for camera techniques and a creative eye.

Some UG and PG institutes for FilmMaking/Documentary are,
1. Mumbai University, 3 Yrs B.A. Programme In Film, Television And New Media Production
2. M.G.R. Government Film And Television Institute, 3 Yrs Diploma In Film Technology And TV Production (cinematography)
3. Satyajit Ray Film & Television Institute, Kolkata, 3 Yrs Postgraduate Programme In Cinema
4. Film And Television Institute Of India, Pune, 1 Year, 3 Year Three Year PG Diploma In Sound Recording And Sound Design, One Year PG Certificate Course In TV Direction, One Year PG Certificate Course In Video Editing, One Year PG Certificate Course In Sound Recording And TV Engineering
5. Ajeenkya Dy Patil University, Pune, 3 Year B.Sc. In Film Making
6. M.G.R. Government Film And Television Institute, 3 Yrs Diploma In Film Technology And TV Production (cinematography)


Hope this helps!