The .45 is a lot "softer" shooting than you'd expect a compact .45 to be.
Yes, it has some kick, but it is more of a big push, instead of the snap of the higher pressure 9mm.
9mm pressure is 35,000 to 38,000 for +P, while the .45 pressure is 18,000 to 21,000 for +P.

You should try a .45 Shield if you know someone that has one or you can rent one somewhere.

Also helping is the bigger grip of the .45 compared to the 9mm or .40 Shield.

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U. S. Army Veteran