Raiding Tombs... (coloring WIP1)

I'm so excited about this new challenge , so I decided to make a step by step in the evolution of this coloring .
Well, this lineart is amazing , completely full of details, some things very challenging, great to get out of the comfort zone now that I lost a little afraid of coloured pencils (but just slightly ).
I don't want to make a copy of the original drawing, I would change some colors, I don't know, give my personal touch .

At first I had no idea where to start  (I think I spent an entire day observing and understanding the lineart ). The first thing that came to mind was make light sources (is exciting because it could be up to 4 different light types ).
And so I started this sensational journey through colors, light sources and shadows . I don't want to explain the entire procedure nor the pictures, because the truth is I don't have a plan prepared, I'm just letting me go with the colors.
But there is still a lot of work to do, so I don't know how long it will take to finish, but that's not important, I'm really enjoying this trip.

Lineart by: Original ->Lara Croft (Pencils + Finished Work)
Colors:

As always, questions and comments are welcome as well as constructive criticism  (which would be very useful at the moment ).