In Nursing Program but wants to be a Physician Assistant?

I'm in a nursing program at my high school and just got picked as one of the students to advance as a Nursing Assistant. I recently decided that I want to become a Physician Assistant and go to college after graduation. If I complete the nursing program at my school, it will allow me to become a CNA. So, will it be the "best" choice for me to complete the nursing program and still be able to become a Physician Assistant later on? What limits will I come across if so?

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