Career choice help!

K so I’m a senior at a public high school and im applying to several universities and feel horrible to the fact that I’m choosing undeclared for my major and minor. But the thing is that I don’t know what I want to study. I love learning new things and going to school. I was thinking to be a psychologist cause I like helping people out and advising them. or a fashion designer because I love fashion but that industry is quite competitive. But I dot know if that’s really what I would love to do for the rest of my life. I love to dance but I wouldn’t want to be a dance teacher. I want a profession. I kinda see myself more in the social worker study area or maybe a lawyer I have some law in me. I really dont know I see myself a little of everything . I really want to love what I do and be great at it. Not just because of the money. Do I really have to declare a major in order to guide me into the right direction at discovering my true interest of study at a public university. Getting into a public university undeclared how wold that help me on my path onto discovering what career is best for me? I know you have to take different sorts of classes for different majors and minors would that be a problem when choosing my major and minor later on concerning required credits etc? Please help me I really need some advice. thank you