DonS

You're in it. It's a combined AD & AP forum with a iPad sub-forum.

With that sort of task, painting, not selecting, is the way to go. Much easier with a graphic tablet of course, but can  be done with a mouse. 
 
It was only quick because I did it roughly to demonstrate. I went over quite a few edges and of course, I only did two areas. It would take a lot longer to do a proper job. Hopefully, you at least know where to start. A family photo with sentimental value is well worth spending time on. I have done a few for my family over the years and everybody was so pleased.
 
Make a Recolour adjustment layer . . . Layer > New Adjustment Layer > Recolour Adjustment . It will cover the whole image but don't worry. Adjust the sliders to get one colour you want to apply, like for the robe.
Invert the Recolour Adjustment layer. Layer > Invert. 
Now, when you paint on the Recolour Adjustment layer (not the image layer) with white paint, it paints the colour on, but keeps the details of the greyscale image below.
You have to repeat the new Recolour Adjustment layer, invert and paint process wherever you want to apply colour so it is a fairly time consuming business but the results can be very good.
 
What will help to make the skin look more natural is to select the faces and apply an Add Noise Filter. Say about 10%. That will apply a bit of natural texture.
 

I am having trouble in the Color Panel when the foreground is Black and the Background is White and I Change them to Foreground Red or some other color and and the Background Green.
How do I automatically return the the Black & White selection.  Is they a shortcut key for this?
If not, please supply the most simplest way to achieve this.
Also when a red line is thru one of the choices how do you get rid of it (example white is showing
a red line thru it cutting it in half but showing the full circle.