I posted here before showing my previous drawings.And this time I believe I have improved my work. So I'm waiting for the feedbacks :)
Try rounding the sharper parts of the closed fist. It looks a little blocky.
I really like the fist drawing. The hand with a wine glass is cool and you did a very good job with the hand but the glass needs some work as well as the liquid inside the glass. At first glance it looks like a design on the glass rather than the liquid inside the glass. Also the stem and base do not look right. Please take my comments with a grain of salt because I am just an abstract artist that can't paint or draw real objects at all.