[hpagey]

Find customers first, atleast 10 paying ones. These customers should be non related (no family, friends, close contacts). Then you can declare some sort of product market fit. Depending on your market, this could take anywhere between 3 months to 2 years. Once you have had you have to concentrate on building a repeatable sales process. If you are non developer trying selling first and building later, and don't leave your job until you have some confidence in product/market fit.