Well, flame me if you want, but I wouldn't start someone out with a .45. The ammo is expensive; except for the 1911's the frames are bigger than the 9's and 40's and harder to conceal; the double stack auto grips are often very fat with aggressive stipling that isn't comfortable.
I'm used to shooting .357's with both a full size Colt and a 4 inch Mod. 19,so I can handle recoil. But,the Springfield XD with the fat grip and the aggressive stipling would start to wear blisters on my hand after about three mags. The XD would walk around in my hand because the grip was too fat.
I've also shot the full size Glock, which was more comfortable than the XD, but the angle of the grip combined with the recoil wound up making my wrist ache after about fifty rounds.
I haven't shot a 1911, and with the slender grips that might work better. But, to start a newbie out on something like the double stack auto's is not something I would recommend.