Affiliate Marketing Secrets

I’m having trouble finding my muse, in general my interests are basketball, finance, books, but I don’t see how any of these can made into my niche market, for all of these there are already tons of different aspects of content surrounding them. Does anyone know of a niche that is not necessarily something I’d be a part of but something can be easily exploited? I’m in college and I am tired of dead end jobs serving others for a horrible wage. I want to live life on my own terms!! thanks 🙂