Everything can print without supports. The tallest object goes along the length of the forearm and can be tricky to print. I suggest using PETG or some other filament with some give to it. The pieces with holes are connected using either M2 screws or Some filament. For the wrist, I would suggest filament because it needs to be put on before it is assembled. I do not have a design for the hand. I would suggest an Iron Man style design.