I am new to maganeto and would like to know the best practice of order fulfillment. We receives orders from our ecommerce website to magento and how do I perform the following in magento:
Order picked, packed, shipped, delivered or returned and closed.
I'm not sure what you mean. But if you're writing about additional order statuses, this extension will help you https://amasty.com/order-status-for-magento-2.html
The features include: