Interior designing is a vastly complex architectural process.. It is to be learned from someone and acquired as an art. The more practical knowledge of various little tricks and tweeks you have of related mmaterials the more good you will be on this sector.

Now there are professional online courses of interior designing but I would suggest you to take admission in a school or iinstitutions where they teach interior designing and will give you a professional degree or work under a professional as an apprentice. if you want to make interior designing you career than following what I have said will take you in the right direction.