Start as soon as possible and fail fast and fail cheaply. On upwork you can hire devs for cheap. An alternative I like better is starterhive.com because you can offer equity as compensation so it is zero risk to you as a business owner to start your own business (you can also pay a fixed price, equity, or a combo).

I would set up an Upwork or Fiverr profile for project-based work. I just created starterhive.com which connects startups/people with cool business ideas with talent and also offers equity as compensation. Either of these three options should help you out!