I was going to say the same thing! Why do you have to decide now EXACTLY what you want to do for a living? You know that you have a vague interest in the dental field or some sort of direct-service health field. Why don’t you just apply to a four-year college to get an education? Apply to one that has a dental hygiene program so that can be an option. if you go to college for an education you just might discover other fields you are interested in.
This is not a reason not to pursue a career. Take the long view. I know that is hard for a high schooler. But look at it this way: You are going to be 30 anyway. You might as well be 30 and doing what you want.
By the way, an orthodontist makes AT LEAST double the income you named. In some areas it could be closer to $600k. But in any area it will be a lot more than $200k.
If you are interested in a direct-service health field, look into optometry school. It’s four years post college.