To me, nursing is more than just medicine. It's care and compassion, hope and support.
I think this can be a better hook for your essay. I mean you can start with this point and then go on to explain how you perceive nursing and what you intend to do with that profession. That seems to be a better logical arrangement.
When I was younger I had to go through some medical testing, and I remember the nurses being so kind. They would tell me what a tough little girl I was after getting shots, and they made me feel brave.
It's nicer and more emotional had you isolated a particular incident and a nurse/ nurses here. Give more focus to a particular event.