In response to:

"2) I want to be an anthropologist. Or something in that area. Human psyche, social systems, human history etc. etc. I'd probably have to travel a bit though, need a bit of £££.

3) I want to help the world and the human race. That is key instinct.";

You might find Mountains Beyond Mountains by Tracy Kidder of some interest. That is, if you like to read. It's pretty interesting and eye opening.

By the way, don't think you are the youngest by a long shot here. I'm 18. :)