I am 30 and have some credits under me belt. I am planning in going back to school fulltime....?

..at community college but am unsure on what to major in. I am extremely outgoing and want to do something that makes a decent amount if not alot of money... i thought about marketing and also becoming a manager at the medical office i work for but I am at a loss because i like such a wide array of things how do you pinpoint one career?