Creating a character with a view

I’m trying to create a character class that has a first person low resolution view, maybe 256x256, which wold be rendered as a texture maybe for some processing.
I just want to know how I can access and store this view as a 2D array of floats.
I’m new to UE4 so know basically nothing about how the system works.
I’ve looked at SceneCapture2D and GetCameraView but I don’t understand how to call these in code.