Make hand by using network

Can you help to make a hand by using network? How to build curves for that?

Here’s a link to a video tutorial using SubD tools:

Thanks a lot.
SubD is available only for rhino 7 ?Im using rhino 5(my laptop have very low secifications)…

Unfortunately, SubD tools are not in V5.

So, how to make it by using just network tool?

These videos might be helpful: