Google Sketch CAD

As I have displayed previously, I have been using Google Sketch now for two years now, and I would say I know how to do most things and what tools are right for what

However, with the CAD lessons in University, taking place, the basics are explained once again. I'm not the only one that is efficient in this field, there are many others. However when explained, there are certain elements that I did not know about

Like how to draw an accurate grid ( 9x9x9) or how to simply scale a line to a particular measurement, without judging.

or how to accurately place and create several floors. This would have been handy and would have developed my work a lot more last year :(

The same process can be applied to stairs, columns, beams, walls e.t.c
Again this would have been such a great skill to have last year, but this is all part of learning :(