Hi,

First of all let me clear one concept. NID is primarily a design institute and the courses are oriented like that. Courses are not segregated as per the background. So first you have to decide which area of design you are interested in. These courses are not to be taken according to what is suitable because suitable may mean career for some, interest for some or something else and that no one can decide for you except yourself.

Engineering graduates generally opt for product design, graphic design, digital design, information design, strategic design management etc. These are some specializations that may work for you if you want to match your engineering background with the design course.  But the basic thing is that you need to check the syllabus and the course design of each specialization before you join in. Other than NID, there is CEED also that you could check out.