Power BI offers several Help tools and examples to help users. Located in the help section of the Tool Bar.
Videos and Tutorials on how to create and use analytic's reports with Power BI
Get started building with Power BI - Training | Microsoft Learn
Create and use analytics reports with Power BI - Training | Microsoft Learn
Explore data in Power BI - Training | Microsoft Learn
Publish and share in Power BI - Training | Microsoft Learn
Power BI Tools
Use visuals in Power BI - Training | Microsoft Learn