Now, all tools have been installed and are ready to use. Do not hesitate to take a look at the example files to experiment with the scene loader. There are some example (scene) files including a skull and the scene building with 3ds Max. Naturally, you'll find how to use the scene loader in your code and then get the proper architecture.
As the next step, it is a good occasion to introduce the notion of materials and how to customize the 3D object's appearance using these materials. Of course, Babylon.js already provides you with a default material that makes the work on materials easier than creating materials yourself.