Here's some good advice... Marry well... retire early... do exactly whatever you want to do.
Seriously -- having two kids in college (well - one after this last weekend!)... neither has any idea what they "really" want to do. I don't know how anyone could at this age. What do you have to make a comparison against... not much... right? So how could anyone possibly choose a path and know with certainty that is what they will love to do the rest of their life.
I'd say - think about a career - close your eyes - and what is the first thing that pops into your head... no changing - no managing the thought...
It's like making a color choice for a car project - you have to SEE the same color every time you think about it... and then not waiver and let someone else talk you into changing it. Whatever "it" is. Some people just want to be professional greens keepers... COOL! Some want to be nurses... or programmers.. But I don't think the happiest people make career choices based on pay. That just won't work. Or won't work for very long...
Here's what I've told both my kids -- GET YOUR EDUCATION FIRST... i.e., graduate college... THEN you can be anything you want to be - even if that's a truck driver... but you're a truck driver because that's what you want to be - not because you have to be.