a good start everyone

Welcome to the challenge
KotLeopold - nice start. I think retopoing could help - you've almost got some webbing between the fingers now in the refined version. Also the styloid process of the ulna looks a bit too spikey and sharp.
Also perhaps referencing your own hand to see how the skin wraps around the fingers where they join the palm could help. Right now they seem to be stuck in there
mdonze - great to have you in

A very challenging pose you've got there. I look forward to how it develops
Zozobra - good start and an interesting pose

Keep going - it would be cool to see the pose from other points of view
d3ltus - welcome