Looks like I pulled it off. In spite of a severe head-wound suffered earlier today whilst researching the installation (voluntarily slammed repeatedly and violently into my desk) I figgered it out. If I'm honest (ha!) it was easy, but I'm known for being ridiculously cautious to the point of just standing there stunned and barely breathing. But I done did it thanks to an excellent and intuitive installer.
Having used various Linux distros over the past 15 years, I think (ha!) I'm qualified to say this is the most exciting OS I have yet tried. It is deep and robust, elegant and sophisticated, things I might venture were and still are absent with several others I have abused. It's skilled, adaptable and effective which is very high praise from me. I am most grateful to the developers and their fellow travelers.
I'm gonna be a might distracted for spell... I gots me a new shiny object that gets shinier with each keystroke. Learning a good new Linux distro is the best gaming experience there is!
First order of bidness: get sound to my external monitor. There is great joy when one hunts around through dozens of posts, eventually finding various fixes, then punching in the right one, et voila! I really like the kind that causes console (er, Konsole) to list off thousands of lines of code. It's the mechanic in me that enjoys watching a machine work to purpose.
And I plan to load up on some suitable pharmaceuticals and train my little Piranha fish to use a funnel for feedings, change my pan and wash me up a couple times a month. I'm goin' deep.
I forgot the most important thing! What first caught my eye—other than the beauty of this beast—was the principle/statement on ram usage. I've never really understood why ram must be spared at all times, especially when using a capable OS like Garuda. That's dated and archaic thinking IMO. I'm going to enjoy where these developers lead.
I'll likely look a little deeper some time to see how Garuda uses ram etc in action, but I can already see it's very competent indeed.