Hi Everyone,
I will show you how to add the model found in this site to your Blender scene.
First you need to click there :

Second you click on the .blend file you downloaded .
You go in Collection :

And finaly click on the collection with the name of your download for exemple :

Then the model will be in your scene.
I hope this helped you, if you have any question you can email me in the contact section.
FreeBlenderWorld