In response to all of your questions.
I already own a 380 S&W sigma so buying another 380 is why i am looking at the Seecamp. I got to fire one of the instructors Seecamps that was a .32 but as i have a .380 pistol already i figure another one couldn't hurt especially as how small the Seecamp is. Yes this would be my bare minimum carry and most times my backup gun.
As far as me taking the test with a .22 LR. Yes i can handle a .45 ACP in fact i do own one and that will most likely be my primary carry gun. I am large enough to carry it and conceal a full size 1911. I can shoot close groups with mine. The last time i shot it from 25 yards I placed all three mags on target and could cover the group with one hand.
I own a few different pistols and all of them could be carried concealed. The 22 was used as one of my coworkers just went through a concealed carry class and the instructor was not happy when he took it with a 38. The instructor at his class preferred people to use 22s. My class instructor was not of the same mind and there was 45s 357 and two people with 22 pistols.