This is the 'simple' trail to just getting the High Sierra installer. I fear that after all of this that the 'Firmware Lock' which won't allow me to select the password field will give me problems.
(https://support.apple.com/en-us/HT201372) 'How to create a bootable installer for macOS'
(https://support.apple.com/en-us/HT208969) 'How to upgrade to macOS High Sierra'
4. Download macOS High Sierra
For the strongest security and latest features, find out whether you can upgrade to macOS Mojave, the latest version of the Mac operating system.
--> If you still need macOS High Sierra, use this App Store link: Get macOS High Sierra.
That got me to a place in the App Store application that I couldn't find with multiple searches. Once it downloads from the store, it will try to install. Stop this by quitting the High Sierra Installer from its menu.
Now you can go back to (https://support.apple.com/en-us/HT201372) 'How to create a bootable installer for macOS' and continue.
I haven't attempted to install this on a thumb drive and finally be able to run 'Disk Utility' but I have a feeling I'm not finished asking questions.
Thank you for the assistance. I'll post the results if I can.