Thanks for the answer!
Actually, I already saw those pages. For the first one, I can’t find the node Get Hand Position and Orientation in the Blue Print Editore and, for the second one, it is a bit too advanced for me and It is to make a VR setup from scratch.
The closest I found in the BluePrint Editor is this node : http://api.unrealengine.com/INT/BlueprintAPI/SteamVR/GetTrackedDevicePositionandOrien-/index.html