Many blender courses simply drop you into the deep end and hope you'll figure out how to end. They use terms without first explaining what those terms mean, and by the end of it I have more questions than answers. It's really frustrating going from video to video, course to course, and not feeling like you have the basics down. Zach explains things in good detail, sometimes too much detail for my care. At the end of the course you'll actually feel proficient in using Blender without worrying what X means or what Y does.
A suggestion for improvement: Provide full text transcript with screenshots. I have ADHD, and it's much faster for me to read something than listen to a video.