The world probably doesn’t need another song about going back home. But your mother will most certainly love it.
The world certainly doesn’t need another app for tracking personal expenses. But if you don’t like the existing ones, why not build it just for yourself?
The world doesn’t care about what you write, if it’s good enough, or important. But if it’s important to you, isn’t that enough?
Doing something for the world sounds huge and overwhelming. Do what matters to you. It can be commonplace, uncharacteristic, or even garbage.
Love your garbage, and work hard.
In the end, ironically, the world loves people who are bold enough to love their garbage, and work hard enough to make it great.