Doug,
Hi, you have done a very good job. You have got the look throughout the photo very consistant. I have done some quick layers adjustments to keep it a natural photo look with the detail that is in the photo just to show a different approach.
You should definantly learn layers, jump in and play.
The photo you did looks a little unreal with the clothing being so dark and faces so clear. But it is an excellent job, if that is the look you wanted you kicked _

It is pretty to look at with the smoother tones you have created with your technique, without all the noise/grain of the original.
Descriptions are in the name of each layer, with the blending mode.
Working from the background layer;
-First the background layer (did nothing to it)
-Curves to lighten bottom (used gradient to mask to just the bottom)
-Levels layer in screen mode to lighten overall
-Curves to raise contrast in bottom
-Curves to darken to in multiply mode
-Curves in multiply layer duplicated and backed off to 70% opacity
-Curves to raise overall contrast now that all has about the same look
-blank layer in overlay mode, white and black painted at 10% brush opacity to lighten and darken respectively
Do the tutorials and then come back and look at this and it will start to make sense, I promise.
Roger