Thanks for reaching here! Some of the resources link would be helpful to become familiar with the basic principles of Microsoft Azure Media Services and learn how to design and implement client applications that use Media Services to provide scalable, cost effective, end-to-end media distribution solutions.
Azure Media Services (v3) documentation
Microsoft Azure Media Services Guidance – Book Download
Build media based solution with Azure Media Services
Getting Started with Azure Media Services
Hope this helps, Let us know if you have any query related to this.