We recommend you first make sure that your store is ready for business. Please refer to the following help article to check the single steps:
How do I get my Jimdo store ready for business?
Moreover, you should of course publish your website because only then will your visitors be able to open your website in their browser.
When sharing the name of your own domain it is also important that your domain is properly connected to your website.
Minimum order value
The supported payment providers Stripe and PayPal require a minimum value that needs to be reached in order to process a transaction.
Therefore, it is important that the total value of an order (sans shipping cost) is at least $1 (or 1 full unit of the chosen currency). This minimum order value also applies in cases where a discount code is used to lower the price of shop items in the cart.