Well… that’s very long way to put.
I also have similar problem like you. I have concept and some methods, which sometimes works or not. is it 2D? 3D?
But first, before you even programming, you need solid game design about Game Play (and possibly story, if there is) on PAPER, not in your head.
When you can comes with your solid game design, which to implement, you will find what you need like myself.
That’s advice I can give you. If you can contact me, if you want. This is my first time in Unreal, but made shabby, crappy short games in Unity, Cocos2DX.
Thus I am newbie, but for concept, i can give you some answer, which might provide you some idea.