"Still waiting for root device".
When installing this means that your USB flash drive cannot be found.
This is usually because the flash drive is in a USB3 port.
If this is the case move it to a USB2 port, if it is already in a USB2 port move it to another and try again.
Repeat until you have tried all USB ports.
Use a USB2 flash drive.
If it still doesn't work you could try another flash drive.
You might also try enabling Legacy on your USB3 ports in your BIOS settings.
If you only have USB3 ports try with your USB flash drive in a USB2 hub.
Make sure Fast Boot is not activated in your BIOS.
May require
USBInjectAll.kext in /EFI/CLOVER/kexts/Other/.
May require
XHCI-200-series-injector.kext in /EFI/CLOVER/kexts/Other/.
May need
new patch for 10.14 to remove XHCI USB Port Limit to /Volumes/EFI/EFI/CLOVER/config.plist.