FreeCAD isn’t the flashiest option, and I wouldn’t describe it as the most beginner-friendly path on day one.
Part Design operations for creating and modifying 3D features in FreeCAD 1.0. For a NEW part (no solid yet): click 'Body' in the model tree (left panel). For sketching ON an existing face: click the ...
SolveSpace is a free, open-source CAD tool that fits in 1MB, with a full 3D solver, parametric sketching, and a browser-based ...