Can anyone help me with the hands? I have no idea how to do this

[vivid carbon]

Also I changed the angle of the face a bit, but the jaw feels wrong? Please help I really wanna learn and get better!

[left wedge]

I'm not a professional artist as I cannot draw in a way you can (which ur art is looking really good), but looking at the reference's hand by the head, its hidden so you could do like a trapezium kind of for it then round it out more if you get what I mean

[vivid carbon]

I don’t understand 😔😔😭

[left wedge]

eh I'm not good help then