Need to 'Quick format' the USB drive with Rufus using 'FreeDOS' under 'Boot selection'.
Need to have the USB drive plugged in and then restart your PC.
You
may need to disable 'Fast Boot' in the BIOS.
You can bring up the 'Boot Device' menu after POST but before Windows starts loading by spamming an F key, I think that it may be F7 for that mobo..Or plug in, restart, and set the USB drive as the first boot device, which you did already.
Did you do/try all that?