Please note, there is no VR solution in this pack. You will have to assign the position of the hands to the controllers. Copy one hand and flip its X-Scale to -1 for the opposite hand. Easily make variations to the material for a-symmetry.
Alternatively you can get this on unreal marketplace if it is more convenient: https://www.unrealengine.com/marketplace/en-US/male-hands-with-skin-tones-animations-and-poses