Many video and document base tutorials are available to users that covers a wide variety of Power BI subjects.
Microsoft provides a series of tutorials,documentation and help.
Getting Started: Power BI on Microsoft Learn | Microsoft Learn
Documentation: Power BI documentation - Power BI | Microsoft Learn
Videos: Microsoft Power BI - YouTube
Community: Home - Microsoft Power BI Community
You can also search the web for third party information on Power BI.
Data Analyst Archives - Cloud Training Program (k21academy.com)