Also a newbie, but one problem I had with this image is the light source :/
Is it frontal ?
If it is, the the front of the head robe should be bright too.
I did some testing with the hand/head/robe , and used the torch as a frontal-top-right light source.
I'm happy with the head and hand, but messed up the robe.
Maybe it helps a littlebit
?