i'm 21 and the way I decided is basically took all my courses with a keen interest.. then did some research to understand the future of business and really which master's will get me a job that I loved + security...
the thing is not all of us can be whatever we want to be.. for instance I can't become an aerospace engineer simply because I don't believe I have the aptitude for it and that's perfectly fine.
you have to be realistic and think about what you'll be good at once you choose it and ensure it's something you see yourself doing for the rest of your life. but most importantly, pick a career path that you think you can handle that you'll love..
best of luck!
