I would actually recommend avoiding the Part workbench and only using Part Design, at least to start with. The Part workbench makes you create your object usin

I would actually recommend avoiding the Part workbench and only using Part Design, at least to start with. The Part workbench makes you create your object using CSG primitives which you size and position using the properties editor, which is just super painful. In Part Design, you create sketches of 2d profiles and then pad them up, pocket them in, revolve them around an axis, sweep them through a path, etc. Part Design just seems much more convenient and powerful. The only thing you can't do in Part Design is create 3d paths like helixes, but fortunately you can create these using the Part workbench and still use them as paths in Part Design.