Design

First step to do is complete 12th with good marks and then try getting into a design course.

Please explain where are you migrated from? So that we can help you further.

You've decided to pursue a career in fashion, but can't settle on which professional path to take--the creative or business one. Here are a few questions to ask yourself as you make this important career choice.
Do you consider yourself more creative or analytical? What gets your blood pulsing--the

You may get into NIFT.

Yes, there are a lot of short-term courses available for interior designing. Please refer to the link below:
https://goo.gl/vmuZmp

Some of the top institutes for graphic design are:-
1. Arena Multimedia.
2. Global School of Animation.
3. Maya Academy of Advanced Cinematic (MAAC).
4. Tekno Point Multimedia.
5. Picasso Animation College.
6. Massco Media (MM).
7. Zee Institute of Creative Arts (ZICA).
8. Toonzwebel Academy (TWA) Kolkata.
9

Please refer to the link below:
https://www.shiksha.com/articles/top-10-interior-design-schools-in-india-blogId-10599

You have already decided on the course you wish to pursue and that is interior designing. The college that I can suggest you is either go for NID or NIFT.

No, it is not a compulsion to stay in hostel there.