Garware Institute of Career Education and Development, University of Mumbai

You need a degree in order to pursue Masters in any stream as Diploma isn't a degree. So, you aren't eligible to do apply for any Masters degree.

Yes, you can get into ABM but you have to give entrance first.

You can always go for PG level in Interiors. PG has both Degree and Diploma. You can choose PG diploma for career enhancement. Going for a PG degree from any University might be a problem as the mandatory qualification is Graduation. But, you can try your luck and speak too few of the institutes and discuss your situation. Below is the link to find colleges.
https://www.shiksha.com/design/interior-design/colleges/colleges-india?uaf[]=credential&ts=83273627&rf=filters&cl[]=15&cr[]=9

Not all colleges offers 100% placements. For updated information I would suggest you to contact the college officials or alumni. Below are placement details of Garware Institute of Career Education and Development, University of Mumbai - Post Graduate Diploma in Tourism and Travel Industry Management: Placements (as provided by college) Companies where students got placed Cox and Kings Kesari travels sotc Tamarind Thomas Cook

Hi!
There are plenty of job opportunities. You can work as a Travel Consultant, Event Manager, Cruise Manager, Tour Guide, Sales and Marketing Consultant/Manager.

Hi Angad!
You can enquire the details by contacting the institute directly.