What can you do with the college minor Can you use your college minor to get a licensed profession? ?

What is the purpose of a college minor? What can you do with the college minor? Can you use your college minor to get a licensed profession? I'm an incoming college freshmen, I currently major in Pre-Nursing, but I don't know if I want to pursue it yet. Back in high school, I wanted to major in accounting, but I want to make sure I actually like accounting before I actually commit to accounting. So, I was thinking of minoring in accounting. I also doesn't want to spend extra years in university, so I want to make sure I change to the major I wanted to pursue in as soon as possible. Please help me out!