Have you completed your commerce graduation or about to complete?
Anyways, you are not eligible for food and nutrition courses on the basis of commerce studies. They are purely science / biology subject domains.
How did you know that your interests are in health and wellness field? IF you have decided that you wish to be in the well ness industry, then instead of nutrition and food, you can think of Aerobics, Yoga, Gym, hospital management, freelance nutrition consulting like Herbalife, etc.
BA Yoga is not a long term career if are looking for a job etc.
I feel, you are to