FreeCAD 3D was a tough slog for me, I have to admit. But, honestly, any one can learn it. Just takes raw determination. If you have good internet access it is even easier. I went through 12 videos or so to be able to learn it.
I think with your background
@woodchucker it wouldn't be that hard for you to learn. Once you get a couple of ideas to click it becomes much, much easier.
I seemed to have had some kind of mental block on all 3d CAD until I watched and followed along with the videos. After a week, it was a lot less difficult. In two weeks, it was a little rough, but ok. After 3 weeks it seemed to make sense. Now if I need to design something, I just go straight to FreeCAD and start doing it. Most of the time, it's a lot easier than doing a hand sketch! And the drawings are to scale. Give it a try. There's quite a few of us that can help. Just post in the FreeCAD sub forum.