How the fuck do I draw hands?

By using references and building up a visual library. So yeah, like any other part of the human body.
Let me guess. You are bad at all the rest of the human body just as much, but you just can't tell, right?
I'm assuming this because you are afraid of posting your art and you are asking pretty dumb questions.

>>2746347
Not really.
Hands are just my general weakpoints really. I am going to admit that I also have a problem at creating dynamic poses but through Hampton and Proko I've been practicing Gesture and Mannequinization and I have been getting results from it.
But hands in particular are just where I have the most problem.

>>2746339
I simplify it down into a bunch of rectangular prisms in my head while drawing them. It really helps with structure and posing.

Copying out Bridgman's hand drawings helped a lot too.

Otherwise it's handy (get it?) to have a small mirror on your desk so you can try out poses yourself and draw from life when you are stuck.

>>2746355
Problems with drawing hands generally indicate fundamental drawing issues. There are perspective/viewpoint concerns when drawing fingers because fingers bend on one axis. If you don't convincingly show the finger bending on it's axis you will ruin the appeal of the hand because the fingers will look floppy. You also need to make sure you don't draw the fingers in positions outside of the joints' range of movement, which can occur by mis-reading the orientation of the palm/back of the hand.

>>2746594

Fingers other than thumb are made out of 3 bones/joints, so actually there's more bending involved than 1 axis.

Btw, that's why it's best to reference your own hand - you will quickly see that in one plane there's only 90 degrees possible bending and in other (the plane same as palm) around/a bit less than 45 in both sides.