Define passionate?

Does being passionate about something mean you have to be knowledgeable and capable?

When I think about the people I consider to be passionate, they all have one thing in common. They are all extremely knowledgeable about their specific interest or hobby they're passionate about.

I'm not an expert on anything. I have interest in many things. I like horses, but I don't know anything about them. I like to read, but I can't quote Dostoyevsky. I like stained glass, and even know how to use a soldering iron, but I'm no expert craftsman. I like cars, I like to watch racing, go to car shows and auctions. One of my favorite past times is to just ride in the car with my fiance while we drive around looking at cars. But when it comes decoding VIN tags, rebuilding an engine, or even discussing the history of a certain marque at length, I'm not your girl. But I could be.

I'm just an average person with average talents. I've always accepted the fact I'm just not a passionate person. But I've reached a point where I don't want to just coast anymore. Until now I've been driving down the center line of life. It's time to find out if I'm capable of more.