I would love to become a fitness instructor, but I don’t have the “body” of one?

I have struggled with my weight for as long as I can remember. I fluctuate a lot, but had packed on 80 lbs 2 yrs ago and was diagnosed with Metabolic Syndrome and am following low glycemic diet as well as exercising 5 times a week. I have dropped 30lbs and am still going slowly but steady. I really enjoy low impact exercises such as walking, elliptical, toning, pilates and tai chi. I am not into the heavy stuff. But I really enjoy the excercises I do and thought how much I would enjoy being an instructor, but I DO NOT have the body of a trainer/instructor and even after I lose teh weight I am sure I would need a little nip tuck. I just don’t know if in this business you have to look a certain way to be an example for your clients? I am confident that I can and will get back to my healthy weight but as far as being a hard body….don’t know if it can happen for me