Carrying concealed is so last week. But in my case, I find I need two hands just to draw from serious concealment. With one hand, it is possible but not at all fast. However, let us go back to the original post.
A Glock, you say? Well, that is not such an awful choice but there is no middle ground with a Glock. I did find that the Glock I owned, a Model 19, was just about the easiest automatic with which to chamber a round. It was also the easiest to make go bang, too. I also read your comment about situational awareness but I feel sure there are lots of perfect people here, although I will quickly add that I am not one of them.
Shoot low, sheriff. They're riding Shetlands!
Underneath the starry flag, civilize 'em with a Krag,
and return us to our own beloved homes!
Buy War Bonds.