Some time ago we created a Shopify Manual, which explains how to use the platform.
In most cases, companies do not have a dedicated online store person, so they need to train a few people, if not the whole team. The manual was created to help with that (and to reduce the quantities of emails asking about adding products, but you didn’t hear me say that).
You can sign-up for 14 days free trial of Shopify. If you do, you can follow this tutorial to learn the basics of Shopify store management.