I've started a reply to this thread several times and end up not posting.
I think what I can most strongly encourage is to explore. Test, experiment, research, anything at all that sounds remotely interesting to you. Don't lock yourself into a "this is it forever" sort of thinking pattern, because I'm here to tell you, that is beyond rare. Most people do not pick their course of life at 18 and stick to it without any changes, or refining of the original mission/goal.
Liberal Arts is a good place to start. It will afford you the opportunity to study any number of subjects and see if one resonates more strongly than the next.
I encourage you with total sincerity to follow your love, your bliss if you will (Yes, I know Joseph Campbell and all that) because that is the seed, the core of the truly satisfied (and therefore most emotionally healthy, socially productive and personally secure) person.
Don't push yourself into something that is offered solely because "the money is good," or "the security of the profession is good," or other old "truths" of that nature.
Revel in the options out there and wallow in the glee of having so many choices!!!
Take care and always ask yourself, "what sort of person do I want to be" then go out and BE that person.