I've been trying to figure out what I want to do with my life for the past few years. I still don't have a good answer.
I've realised that almost everyone struggles with this. Nobody's born knowing what they want to do. Nobody's born knowing what their life's work is.
The scary thing is that most people never find out. They live their entire life not knowing what gets them fired up, what makes them motivated, what inspires them to do great work.
I take comfort knowing that finding the answer is half the battle. Once you find the answer, it's easy to be obsessed. Once you're obsessed, it's easy to do great work.