Ah hands! The beginnerās biggest obstacle. Hereās what Iāll recommend.
Understanding the hands:
there are two things you need to understand about hands while you draw them. First is that hands are 3D shapes and you need to think about all the planes of the hands while you draw them. Practicing contour drawing and shaping out a āTron gridā over the hands helps to understand how they work as 3D shapes from the many different angles you will see them from.
The second thing you need to understand is how hands are dependent on other parts of the body. The hands are connected to the wrist, which is connected to the radius and ulna etc etc. when these bones move, so do the bones and tissue of the hands which effects their shape.
If youāre looking to fundamentally improve this, the ol saying of practice practice will be the best way to improve.
What I do:
Iāve learned to draw, and I could spend hours putting together poses, but I prefer to set up my poses in Magic Poser. I will confess that I trace the outlines from the application in order to save time planning out my drawings. You can do that too if you need a shortcut that will allow you to retain your penmanship. I wouldnāt use it as a replacement for training, but when you feel you have the drawing fundamentals ingrained in your brain, it saves a lot of time drawing hands, plus everything else.
You can see some of the hands Iāve drawn with my characters in this picture.

Hope this helps