I found series of Tech Talks on Microsoft Community. For the beginners, It very useful to learn about extending Power Platform with F&O Apps.

This TechTalk series will provide information and resources that will help you determine when to use the Power Platform to extend the capabilities of Finance and Operations Apps. We will cover use cases for Power Automate, Power Apps, Power Virtual Agents, the Common Data Model, and the Common Data Service. In addition, we will cover the do’s and don’ts for Application Lifecycle Management with power platform components with your Finance and Operations apps. 

Please check below reference link.

https://community.dynamics.com/365/b/techtalks/posts/techtalk-series-using-the-power-platform-to-extend-finance-and-operations-apps