I'm working on a side project.
I created a landing page and started publishing my page on some directories, getting a small number of accesses to my page (about 160), about 10% of the customers left their email.
My question is, when do I know for sure that I have a idea that people are interested in? How do I understand when the time has come to work on the MVP?
P.S. my question is just curiosity. As a software developer I must admit that I started developing the MVP before validation: /