Practice pays off
We have been drawing hands and the point of all of this practice is that now you can draw real hands better, which means now you can draw imagined hands better!
Keep in mind the character you would like to draw, and add that character to the hand.
A robot hand will be mechanical and stiff, a witch’s hand will be gnarled and sinister, and a troll hand will be meaty and huge. You can put a lot of character into just a hand!