Hii Shubhangi!

The Eligibility criteria for INIFD interior designing course states that the Candidate must have passed class 12th or an equivalent exam from a recognised board of education. To take admissions in 3- year full time course the Candidate needs to give Apptitude Test conducted by the institute itself. There's To such specified mention about the drawing skills. So, you can apply with average drawing skills as well.

Hope this helps.

Good luck!