I agree this is going really fast when it is all new, and a lot to take in at once. Like many of us I guess who came to this course after dabbling in Blender for a while without real progress, this is probably one of those hurdles to take. No reason to give up though. I will go through the lessons a second or even a third time, take more notes, try it out myself, look things up, until I get some confidence.
