No doubt, but for some reason developing even a rudimentary competency with CAD has always eluded me. My wife has been playing with Sketchup and it also seem to be a challenge.
Download the free test version of 2D General Cadd. Have used it and the original DOS version of Generic Cad for about 30 years. The test version is a full version, but you can not print the drawing.
General CADD - Overview
$600 program that uses simple two letter commands. Very intuitive. There are some tricks to make CAD easier. See my web site for typical drawings done with General Cadd. Using a 2D program to draw everything before you start fabricating can eliminate any rework. No need for 3D to build a conversion.
The main trick is to make template drawings for each scale and each paper size. Once that is done then you just pick a drawing size and the scale template and start drawing.
Now that you are retired, take the time to learn CAD before starting the conversion. Too late?