You start wth your passion know what you are good at. Decide if this will make you a good living or not. Often we choose something that we know we are not good at and do it for the money and later find out we end up with what we love.
Being a lawyer or Doctor is good money but is it what you really want to do. Talk to counselors and do research on what ever you decide to choose. Freshman year is the test stage but you have to ask yourself if you have time to waste so make sure you know what you want so you do not become discouraged later in life