Hello Akshay,

You can do B.Sc in Psychology Hons. in regular mode and Interior designing Certification course or Diploma course in correspondence/ online/ part-time. You cannot do UG Interior Designing course in online as a full-time course and part-time course in online is not available. Because you can't do two degree in regular mode at a time.

Best Colleges in India offering online Diploma in Interior Designing are given below.

AND Academy, Delhi - Total course Fees:  Rs. 1 Lakh - Course duration: 26 weeks - Total seats: 30 seats

Nitte School of Fashion Technology & Interior Design, Yelahanka - Course duration - 1 year

Splenor Academy, Delhi - Course duration - 1 year

I hope this information will help you.

All The Best!!