My future (and present) concerns

Since I was 16 years old I have been dreaming about my job. It usually impress the persons that I tell because it isn't conventional. To be simpler on my explanation, I would like to study untill it tires me, and have a simple job. With a simple job I mean the jobs that are usually underestimate for every one of us because there is no need to study a career to work on them, like part of the cleaning staff, truck driver, porter, etc. Those jobs gives you a lot of experience on how is the world for the majority of the human beens on this planet, and thus open parts of your mind that have been on stand-by due to the comfort. Altough I have experienced that on a little magnitude, maybe I'll have a sabbatical year to experience deeply those kinds of things. Also, those jobs gives you some unapreciated things, like time, that you can use to think and listen music in the case of truck driver, that is why that job attracts me.

Nevertheless I wanna study a variery of things. Enter on Forestal Engineering have really opened my mind to understand how the nature works and hence how WE work as humans, individuals, and social beings. I won't give a precise answer on what I'm gonna study on the future, like doctorate, mayors, minors, etc, but I really know that I'm gonna keep studying untill I find how I can be helpful to the society, therefore I can't neither give a particular answer for my future job.
One thing I do know, is that I'm gonna work on the public system because I have done all of my studies on the public system, so I have to give something back.

Sorry if I let more unanswered questions than those that I replied, but thats how I think and feel :(