Zbrush Creating head from Concept Art need opinions!

Hello guys,i am trying to create a head from a concept art for my game so...please tell if i got close to the concept art..without considering the hair should be darker brown and the fact i did the eyes bigger(eyeball couldn't fit) and sorry for the quick polypaint!:

Concept Art:




I use Zbrush for about a month so...
Should i retopology the head and then unwrap and then put poly paint in it?
Could someone give me analytic info about this!

 

Make the eyes a separate ztool and build the eyelids on the head mesh around the eyes. Currently, I get nauseous looking at her eyes.

 

Thanks ok!I will follow your advice!
Ohh and it's boy!