SketchUp has long been a favorite tool for many designers to build 3D models.
Ever since it was created in 2000 by @Last Software, it has collected a lot of awards.
SketchUp Make offers some templates that you might select when its welcome window opens.

The largest area of the interface is where you are going to spend time building your model.
There is a picture of a person in it that acts as a placeholder.
Get rid of it or keep it, its up to you.

As you make a selection, the selected toolbar appears on the main interface instantly.
Despite its status as a free product, SketchUp Make has a lot to offer.
Of course, there are still some limitations if you compare it with the paid ones.
For example, the inability to export and import CAD files as well as to use solid modeling tools.
For professional designers who deals with projects, the pro version is a better option.
SketchUp Make is not officially supported anymore by the developer.
It has been replaced by the web-based version called SketchUp Free.