Well, what does interest you? It's amazing what you can make a living doing.

I was without any clear idea of what I wanted to study; I too have very few interests. So I picked something I thought I could do, and went with it... I didn't even decide what to start studying for masters degree until the last semester before I graduated. Now I've started my master's, I like what I'm studying, and now I have a clear idea of where I want to go.

Sometimes you must take a leap of faith when deciding what you want to do, and it's okay to change your mind.