All you have to do in Rhino is create a box for example (using the box command). Then Sub-object select using the gumball. You can easily extract faces, extrude them, or move them using the gumball. Then use the Split face command to subdivide the faces and extrude the smaller faces with the gumball. Very easy. As quick as any other program. Not complex at all.
And if you don’t like using the gumball (with the modifier keys), use the old method of typing commands like ExtrudeSrf. Very easy, and you can type in an exact distance as well.