boot – First time Ubuntu installation going nowhere

After years of running CentOS, did not like the stream “option” so decided to give Ubuntu a try. Using Mac OSX, I formatted the USB thumb drive and used BalenaEtcher with downloaded ISO exactly as described in the tutorial here.

Insert the thumb drive into the target machine, start up, and nothing but a flashing cursor.

Have looked at the BIOS settings numerous times and can see nothing out of place.

Next step?