As you probably know, no one can answer the question of "what you want to do" , but you. What do you like to do as a hobby? Read a book, build things, take things apart, study historical things, dissect animals, debate issues, politics, etc. Once you figure that out, that might give you and idea in which direction to head. Also, how much money would you like to make? Some professions pay a lot more than others. If you can determine a broad direction to head in, you can refine your direction while in college or even change majors.
But, if you really can NOT pick a general direction to go in. Postpone going to college for a year and go out and get a job. That may help you to focus.