greetings aliya,

after completing you interior designing, you can do continuing education program at any nift campus.

pls refer to the following link for more details:

https://nift.ac.in/cep

https://nift.ac.in/sites/default/files/2019-06/CE-%20Prospectus%202019%20-%20Final%2030-05-2019%20for%20upload.pdf

you may study a foreign language in case you are looking to settle in a foreign country. that will add great value to your CV.

hope this helps.

good luck.