I need some help on adding a 3D Object.

So I downloaded a free 3d object from TurboSquid as a FBX.rar file, unRAR'd it and had the FBX file of my 3d model in my files. I then tried uploading it into Lens studio, but it is not showing in the scene, nor is it showing me any sort of materials or textures.

If I upload the file as a mesh into a empty mesh through the Scene, it will show up as the model I uploaded but just as a silver texture, and it won't let me add my own textures when I try to add them.