Find free 3D models:
Places to find 3D models include:
Be sure to filter to free, like the link below:
https://www.turbosquid.com/3d-model/free/shoes?synonym=shoe
Converting 3D models:
Convert GLTF (or other model formats) to GLB - a single file with the mesh, material, and texture combined.
https://blackthread.io/gltf-converter/
http://52.4.31.236/convertmodel.html
Additional script by Don McCurdy from the registry needed for models with animations that are not simple translations.
https://github.com/donmccurdy/aframe-extras/tree/master/src/loaders#animation
Full Tutorial with animated GLTF GLB 3D models in AFrame