SP API Integration - Testing the Order APIs in actual use case

Hello,

I'm using SP-API to make integrations with our service platform. So far I've used the static sandbox request responses to develop the main business logic/flow. I want to test the implementation in an actual case.

I want to add a product, then add an order from Amazon end. Then I want to get those orders using SP-API onto our platform. How can I test it by actually adding a product through Seller Central and then adding a test order the same way? Is there a way to do this?

Thanks