Congrats on getting the product built. The key now, before you perform any additional work on it, is to determine if there is a need/want for your product outside of your current user and potential user, that warrants additional time spent, and can subsequently provide you with the ability to earn some cash.
I'd suggest looking at some of the writing around the Lean methodology, especially Customer Development. For example, you can create simple surveys and send them out to potential customers (find customers on forums, FB, wherever), during which you can gauge interest and if they'd be willing to pay.
I'd suggest looking at some of the writing around the Lean methodology, especially Customer Development. For example, you can create simple surveys and send them out to potential customers (find customers on forums, FB, wherever), during which you can gauge interest and if they'd be willing to pay.