The following are good sites to learn Power Platform basics:
What is the Microsoft Power Platform?
https://powerplatform.microsoft.com/en-us/what-is-power-platform/
Microsoft Power Platform Documentation:
https://learn.microsoft.com/en-us/power-platform/
Introduction to Microsoft Power Platform for Developers:
https://learn.microsoft.com/en-us/power-platform/developer/get-started
Describe the Business Value of the Microsoft Power Platform:
https://learn.microsoft.com/en-us/training/modules/introduction-power-platform/
