I'm new and I'm wondering whether I should go with Unity 5 or Unreal Engine 4 for my game

You can do everything with the UE4! :smiley:
But to create an entire game you need a little bit of time to learn everything, because you need to know how to use the engine, a 3d tool, a texture tool, a sound tool,ā€¦

Here are some useful links:
https://docs.unrealengine/latest/INT/
https://wiki.unrealengine/Videos
https://wiki.unrealengine/Main_Page

But due to blueprints + the awesome community I personally would recommend you the UE4 :wink: