bsu6889, I'm sorry that the lecture content did not help you. I wonder if you checked the link on the news board where you can download the Blender version used in my lecture. Go to https://download.blender.org/release/Blender2.79/ and download blender-2.79b-windows64.msi (if your PC is Windows 64-bit), install it, and then take the lecture. In addition to my lecture, I think it will be helpful to refer to Mr. Koo's 2.5D YouTube lecture (https://www.youtube.com/channel/UC4rNhexwVZCzndaWPbLPX_A/videos) to study. In my case, I studied to use some of Blender's functions, so I did not study the current latest Blender interface separately. Of course, I think the basic, broad functions will be the same. If there is a chance in the future, I will update the lecture to the latest version. Well then, I hope you do your best.