Create a Magento-2 module

functionalities needed
->create products including variants ( configurable products we have only volts and core)
->receive orders
->(search orders)
->update order status
->invoice number
->tracking number needs be send
->possible manual with button in order page for example

->order numbers will be saved in magento database in special table

->when exists by orders we need take shipping label too

docs api

https://documenter.getpostman.com/view/4554319/S1a63SJM