Arms move but the hands will not

I have watched a few videos and fixed many of my beginner issues but one thing I have not figured out is why the hands of my puppet will not move with the arms. Actually it appears they are attached correctly but it is almost like there is a pin that I am not seeing that is pinned to the very tip of the finger. The character will stretch the arms but the tip of his finger does not change. I am having a lot of fun with this program but this is kinda getting me. I even used the arm set from the generic model. I would also like the arms to move like arms really would (IK) but that is probably a post for another time if I don't figure it out. I can DM anyone the puppet but I would rather not post it here..... I am not an artist. This is my first shot at creating my own puppet. TIA!