Can I get into NIFT after opting commerce stream?

Yes, NIFT allows student with the following qualifications- The +2 level examination in the 10+2 pattern of examination of any recognized Central/ State Board of Secondary Examination, such as Central Board of Secondary Education / State Board New Delhi, and Council for Indian School of Certificate

Eligibility criteria for NIFT 4 year Bachelor of Design (B Des) course is 10+2 from a recognized Board of education. You are eligible for B.Des as commerce student but not for Bachelor of Fashion Technology (B.F.Tech) at NIFT.