lol I actually also prefer the visual approach. But lacking artistic ability, I struggle with drawing programs.

Openscad lets you see exactly what you want. I do a fair bit of lining up and moving stuff around by eye.

As for the maths side. if you can do basic arithmetic, you're covered.

The openscad manual really doesn't help. makes it sound infinitely more complicated than it actually is.

It's probably not very well suited to producing artistic models. But for practical things, it's pretty hard to beat.