I bought the Veterans' license for Solidworks a couple of times --- the UI never really clicked for me (fortunately, it was at least useful for my son to do homework with).

The one 3D CAD program which I was successful with, after a fashion is the nascent Dune 3D:

https://dune3d.org/

which has been discussed here a bit:

https://news.ycombinator.com/item?id=40228068

https://news.ycombinator.com/item?id=37979758

https://news.ycombinator.com/item?id=41975958