For my AR test, I set up a Unity project with AR Core. I found this tutorial particularly helpful:
https://www.youtube.com/watch?v=R3OCUE9TwZk&ab_channel=Novaborn
While it walked through most of the steps, it had very little information regarding troubleshooting. I had to dig through the AR Core documentation and read some error messages in the Unity console to adjust some device-specific settings.

With AR Core, my app was able to identify planes, display a cursor where the camera was facing, and place objects when you touch the screen.
For my texture, I had trouble with the export/import workflow between Maya, Substance Painter, and Unity. I ended up exporting from substance painter for the default Unity settings it provided and then created custom material applied to an FBX rather than exporting for GLTF.