I don’t know where to start

Languages: Java, C#, C++

Engines: Unity3D, CryEngine, Unreal Engine 4, UDK

Graphics: Blender

Audio: Ableton Live

I’ve got basic skills in the above disciplines I can’t decide to go with UDK (as its relevant to a course I’m running at the moment) or to bite the bullet and hit the Compo with a C++ game.