The foremost problem is lack of domain expertise as others have noted. If you lack domain knowledge but love your idea, the best course of action is to keep you

The foremost problem is lack of domain expertise as others have noted. If you lack domain knowledge but love your idea, the best course of action is to keep your day job and gain as much knowledge as you can before quitting. But another problem is lacking the conviction and traversing the idea maze[0]. Several comments here have provided good paths for possible methods of execution like offering a free API and seeing who is using it. [0] Summary of Balaji's concept here: https://cdixon.org/2013/08/04/the-idea-maze https://cdixon.org/2013/08/04/the-idea-maze