There is a momentum in our society that everyone has to know right away their career. And that is an impossible request, especially for young people. What experience do they have on which to make that decision? Furthermore, from giving psychic readings, almost all of life is about development, unfoldment: you take one step, and the next is revealed. You cannot know too far ahead.
If you follow authentic inner inspiration--that's your soul talking to you--you will be guided to the right experiences, right work, and the most fulfilling life for you.
When you have one of those inspirations, they may not make sense intellectually, but if you take the step, nevertheless, you will find on that path the thing that does make sense, and more sense than you thought possible.
So for young people I would encourage you to notice those deep loves, deep inspirations, deep curiosities, and follow them. Not necessarily as an end in itself, but as a stepping stone to something even more true and real.