Interior Design

you can GOOGLE it or check it on https://shiksha.com or you can also check it on just dial

It will give you a good edge over, implementing your ideation to next level- visualization. And the you can polish the layout and structures.
3ds max is a software, and interior design is a field.

you can start your own firm but it might be risky if you don't know the market situation or the other company's worklayout,
if you gain experience by doing job in medium base company than you will face every possible situation good and bad both and learn how to cross it and it will help you starting your firm after some experience.

Kindly go through the below link.Hope it will resolve your query.
https://design.shiksha.com/designing-courses-in-hyderabad-categorypage-13-1-1-0-0-702-413-2-0-none-1-0

Pearl Academy, IAD, IMS. JD Institute etc are some of the best. Rest you may select from the following link:
https://design.shiksha.com/interior-designing-courses-in-delhi-ncr-categorypage-13-70-1-0-0-10223-1-2-0-none-1-0

Dear Asshi,
Now getting a good college without giving entrance exam is not possible. If you are seriously passionate about the course, then you may prepare for the entrance tests now and appear for the same next year.

Hi
Doing course less than 1 yr in Interior designing doesn't make any sense. If you are okay then 1 year diploma course is available.

Then go what are you waiting for.