Adding HDRI

Hi Davin ddi2082 ,

Change the Color to Environment Texture:

As is shown at ~11:37 in the video.

...and there is also a Basics for Blender 4:

https://cgcookie.com/courses/blender-basics-an-introduction-to-blender-4-x

Yes you are better off watching the updated version of this course with the link Martin provided.

One important thing though, it is always always recommended to follow a course with the Blender version it was recorded with, that way you avoid confusion and you aren't really missing any core knowledge.