You're good!  Thank you for explaining not only HOW you're doing things, but WHY you are doing them!  I loved the part where you noticed an artifact, and not only fixed it, but explained why it was there to begin with.

I've followed a couple of your videos in Blender already. There's a few things in this last one which don't translate well to Blender.  You use a tool here which turns an edge cut into quads.  I don't think we have that in Blender, but I produced the same geometry using the knife tool.  If you know if there's a better way in Blender, please let me know.