WIP - 3d Production Challenge #1 - CGHUB - Adrian Smith

Hello this is the first 3d Production Challenge by CGHUB:
The concept art by ADRIAN SMITH
This is my Entry: 3d Production Challenge #1: - Arthur Duque
RULES:
How to Begin Your Entry
Create a WIP thread under the 3D Production Challenge Forum with the title the title.
You are required to post WIP images as you go along, so your fellow artists can give you feedback and learn from your techniques.
Most importantly, HAVE FUN!
This is the concept:

And so this is the first images: