I think we're having a productive and civil debate for a thread on 1st time home defense gun use.
There are many common features between various types of guns and many legitimate preparatory states to store a handgun or shotgun for home defense. What you stated in the quote above does not exclude using a shotgun as you well know. The means of deployment are dictated by each situation - like the limitations of the user, untrained children in the home, alert lavel, home layout, etc. (I know I'm preaching to the choir, but for the benefit of the 1st time owners).
Most handguns and shotguns have a safety. It can be locked on purpose or by accident due to lact of training.
With a double action revolver, it can be uncocked, on safety, and 2nd chamber empty for safety reasons. It can be cocked, clambered, and off safety if the homeowner is on high alert - or something in between.
A shotgun or semiauto handgun owner can choose to keep the safety off and the round unchambered - requiring "cocking". Or they can keep it cocked, off safety, with a round chambered. I'd say that fits your readiness criteria, but obviously not very smart.
My Smith .44 has a safety and it's double action. So I can have the gun uncocked with the safety off and a round chambered - ready to fire. Or, I can have it cocked with a round clambered ready to fire, but on safety - like most semiautos. I may want to have the hammer cocked and the safety off if I'm really paranoid. Or I can leave the 2nd chamber empty so someone doesn't find the handgun and fire it with the 1st pull of the trigger.
My semiauto Colt .380 has a safety but it's not double action like a PPK, so I need to keep a bullet clambered and on safety if I don't want to require pulling the hammer or racking a round before firing.
After saying all this, the bottom line is - there are several common features to both hand and long guns. It gives the owner options needed for their particular situation. There are always tradeoffs. It's best to start with the most fool-proof solution - learn, train, test scenarios (especially for undesirable outcomes like neighborhood kids rooting through your bedroom, or shooting through walls), then alter accordingly.
I am also a newbie to handguns, I just bought a new Sig P226 9MM on the advice of a pro target shooting friend of mine. I haven’t even fired it yet because I want to be safe and get some training.
Just wanted to see what all you all think of this model gun since I haven’t seen any mentions of Sigs in the other comments (I know, I know, I should have posted here BEFORE I bought it )
Nor does my GP 100 have any safety. None of my revolvers have locks. In fact, only the Clinton Smith and Wessons have that lock. No other revolver, except some of the single action Rugers have any such internal lock.
My recommendation to the OP is to get a GP 100 which has no external safety device. You just pick it up and shoot.