Hi,

I have tried three 3D CAD packages for free :-

Fusion360, which I find the easiest to use, but I don't like cloud based software.
FreeCAD, which I just didn't like
Solid Edge, which I am currently using for 3D printing. It is OK, but a bit user vicious (not user friendly). I am still learning to use it.

There are a lot of others out there and I am sure other members will chip in with their favourites.

Cheers,

Rob