[WheelsAtLarge]

I don't think it's just one thing.

I would:

-Define a business plan. A plan is better than no plan

-Plan a marketing strategy. You have to make sure there's demand for your product.

-Make sure it's available on Amazon so there's an easy way to order it.

- Repeat until there's a steady demand

- Continue by executing your business plan

FYI, going retail is expensive and very resource-intensive. You should wait until after you've gone as far as you can go online.