Doing an entire body at once is a daunting task. The beauty of 3D Coat is that you can easily meld different bits together, so maybe you could try making the hands separately.
A squashed and elongated cube for the wrist, another squashed cube for the palm and cylinders for the thumb and fingers should make a good start for modelling, giving you much of the basic form already. Given how 'soft' voxels are, I've found it easy to push and pull them back and forwards without really getting anywhere, so having the form to begin with is very helpfull.
Good luck!