I was running both Steam VR and WMR along with Open XR under the misguided notion that I need them all. After readling CurdledTree18’s post, I uninstalled Steam VR, then redid my Open XR settings to the above. It’s not perfect, but it worked. For now, all I wanted was to be able to run VR successfully, period. Now that it is running, I’ll be able to fiddle with the settings, gently, a little at a time to see if I can improve it.
Obviously, for me Steam VR was the problem. Using Steam VR interconnected with WMR, and having to use Open XR was too much. Hopefully I’m on the right track now, and things will improve a little at a time.