You chose something interesting to put color to. It's got people in it. Check out how many of these colorized pictures are b-o-r-i-n-g: pigs and sheep and back alleyways. Good for you, and it ain't half bad!

It takes time to too learn this craft, thats what I think it is, a craft. You`ll get better as you color more pics. I have colorized many pics that I just didn`t care for when I was done, some are better than others. From what I can see you do have the right stuff to be very good at this. You are doing the opposite of me when I started out, I was too heavy with the colors, which made them look like neon. In my opinion your just too light, darken your skin tones and other colors. Details in back the grounds are very important, they give it that extra needed look to your pic. Looking forward to seeing more of your work, good luck. Rich