Just a suggestion for
You mention the line
sudo dd bs=4M if=/path/to/manjaro.iso of=/dev/sd[drive letter] status=progress
for burning an ISO to a usb drive. This didn't work in my case, but I finally got a functioning image by adding the option
oflag=sync as recommended in the Arch wiki:
I do not understand the technical detail of this, but could it be worth including it in the Manjaro wiki?