Hii!
There are a number of good institutes you can apply into in order to study diploma in photography. Some of them are -
* Indian School of Media, Mumbai
* Udaan school of photography, matunga west, Mumbai
* National institute of Photography, Dadar west, Mumbai
* Bharati Vidyapeeth's school of photography, pune
* The lightstyle institute of photography, pune
* TIES institute for career training, pune
Etc.,
Hope this helps.
Good luck!