I'm afraid to not help you much, because I'm on the same boat. However, I feel the need to share something interesting of my own experience.

When I was a kid, I asked my mother to buy me an acoustic guitar, and started learning. Overtime, I got into blues and when I was 15 I bought a fake chinese, cheap Les Paul. Long story short, I'd like to be like Slash, at that time. He inspired me. Later I listened to many other great guitarists, as Eric Clapton, Stevie Ray Vaughn and many, many others.

Later, I tried to get serious with music, but had many troubles and quit. Then, I felt the need to find something else. And started programming, God knows why.

Probably because I was introverted and didn't like to interact too much, I've found in programming a great way to express my desire to build and create stuff. And that became my career, some years after. That was around 2006, 2007. Didn't remember.

Then for me, it's not a great passion anymore, neither music or programming, but these have turned into something that I cannot get free now, it's just part of my life.

A passion can start with something you hate and need to avoid, than you create an entire world to live inside. Or, it's a small wish to do something, or to be like someone else. There's a lot of great people that could inspire you, but even if nobody's does, you can find things or ideas. Today I think a lot about freedom, in the philosophical and practical sense.

So, you'll change overtime. Don't worry to pursue a passion forever. Time will tell what is true and what's not. I wish you luck, life is a journey.