Nice. I applaud your efforts and hope you can come up with something that looks slick, is easy to follow for beginners, and works well for improving the documentation.
When i was in FRC (First Robotics Competition) many many years ago (man i feel old), they had these really slick basic wiring diagrams / blueprints that were awesome. They later had some full color ones like the following example, but i personally preferred the black/white blueprint ones with the 3D CAD layout. We would go over to the huge printer meant for the architecture / CAD students and print a huge one out full size and roll them up. Since they were in PDF form this was pretty easy. Not sure what software they used for the layout, i assume Altium Designer, an expensive, confusing, and proprietary system. Good times though. Great memories.
If you could figure out something similar i think it would be awesome. Have you looked into Fritzing? I know it can do something similar, and is open source, but i haven’t used it myself. But check Fritzing out.
P.s. what do you mean by “AutoCAD Eagle”? You mean EagleCAD that was bought out by Autodesk, not Autocad? I know how to use EagleCAD, but it is meant for making PCBs so i dont see how that would be the best software to use. KiCAD is also for PCBs and may have finally matured, but i dont use it.