now that you have explained some of the sources of your discomfort, I would suggest an additional option. You mention that you feel that clients stare at you. This is difficult to address when you are an instructor demonstrating exercises because you expect to look at you; unless they are truly staring at your breasts.
You can try to diffuse a situation like that by asking something like: “I notice you keep looking at ….. Please tell me if you see something wrong.” This will put the burden to explain on them and you can then ask them to stop with an easy explanation. “You are making me very self-conscious.” That way you have given words to ‘looks’ and have put the person on notice.
I wish you good luck with your new studio.