No-one in their right mind carries a 1911 without a holster! If you shoot yourself it still counts. If your gun is taken from you, you just armed a criminal.
Small of back (SOB) carry, i.e, right over your spine, is also highly inadvisable for a number of reasons, including a traumatic spinal cord injury when falling on your back.
I highly advise you to take a defensive handgun training class. Please check the gun ranges in your area for such training classes. I don't mean any government-mandated concealed carry class to get the permit (aka permission slip), but an actual defensive handgun training class that teaches you when and how to draw your firearm, how to shoot it and when to re-holster. Note that you will not be able to take such class without a holster.
A defensive handgun training class is not only for you to learn the right mindset and skill, but also to test the reliability of your equipment and if your setup works for you. In a defensive handgun training class, you typically fire 300-500 rounds. I have personally seen a Kimber Ultra Carry II seize up during such a class. Those small 1911s are known to be finicky jammomatics.
I am leaving you with this educational video, in which Tex Grebner dissects his negligent discharge:
Feel free to ask any training-related questions.
Get some training.