I think there are two things every new 1911 owner should know:
The Idiot Scratch:
https://www.google.com/search?client=safari&rls=en&q=idiot+scrach&ie=UTF-8&oe=UTF-8#q=idiot+scratch
Reholstering:
Placing a pistol into a holster seems fairly straightforward, but it can be surprisingly hazardous and it counts as one of those things that
must be performed properly, every time.
The danger comes when the user gets distracted and fails to set the thumb safety. If the pistol is held in usual grip, the grip safety is defeated as well, meaning that any drag on the trigger can potentially cause a ruinous discharge. The drag can come from allowing the trigger finger to rest on the trigger while the pistol is being holstered, or from the fold of a tee shirt slipping into the trigger guard, or from the soft leather of the holster deforming and rubbing on the side of the trigger - this can happen when you are reholstering while standing or kneeling in an unusual posture.
I say 'ruinous' because of the potential for the round to find its way into the user's thigh. A tunneling thigh wound is a killer - there are large blood vessels which can be damaged, and they will be deep under powerful muscles which will be hardened by spasm. Stopping the bleeding can be impossible. There are numerous stories of police officers and others who have been killed by 'glock leg' even when surrounded by professional help at the range.
I believe there are four steps to correctly reholstering a 1911:
1) Do it deliberately. Understand it's a potentially dangerous moment and give it a moment's attention.
2) Thumb safety on.
3) After you check that it's on, reposition your thumb to the space between the hammer and the frame. Leave it there while the pistol is holstered.
4) As the nose of the pistol enters the holster, find the edge of the holster with the tip of your outstretched trigger finger. If you don't feel it, stop.
The idea of placing the thumb in front of the hammer is twofold - first, it gets you off the grip safety, and second, if the hammer does drop, you have a prayer of slowing it down. The reason for finding the edge of the holster with the trigger finger is primarily to confirm the finger is off the trigger, but also to provide confirmation that the holster is where you think it is. If this unusual grip on the pistol is always preceded by checking the placement of the safety, the two acts will be joined by habit and become an unconscious part of the holstering process.
I also like the general rule that a pistol should either be in both hands, or in the holster. Unless you are bullseye shooting, if you find yourself holding it with one hand, put it away.
These are good habits and they will extend to other makes. Obviously, a Glock will not benefit from either a safety check or a by the placement of the thumb, but the rest of the process is no less necessary. There's no reason not to use the same technique with every pistol.
A good 1911 holster is stiff enough not to bend and drag on the trigger. It also covers both the trigger and the thumb safety.