Like I said, people will spend their life thinking what is it? Every profession requires some kind of training and studying, so you should decide something that you can do for the rest of your life, because once again it requires studying to get a new profession, and first of all you might not even find a place to work even you changed your profession.
For me one of my dream jobs is a doctor. I’ve always been interested in medical things and a career of a doctor would absolutely be something I’d like to do. Helping people would of course be a big part of the doctors assignment but I’d also like to be in the process of improving and researching new medicines and finding ways of treatment to patients etc. A career of a doctor is a very respected career as it does take atleast 9 years of studying and 6 years more if you want to specialize to something such as brain surgeon and so on. You also need to handle maths and chemistry pretty well to become a doctor and thats the biggest problem for me to become a doctor.