In this video, you will learn how to create a SharePoint Approval Flow. We will walk through all of the steps from creating the SharePoint library and setting it up for approvals to building and customizing the Microsoft Flow. These steps work for SharePoint LIsts, SharePoint Document Libraries, and SharePoint Picture Libraries and utilize the native SharePoint approval functionality.
Video on Microsoft Flow for beginners https://www.youtube.com/watch?v=juSuX2eOh5Y
If you need Flow consulting check out PowerApps911 https://www.PowerApps911.com