Runcam split 4 problems?

im really sorry for the long text, but i dont know where else to get help for this camera. I’m 98% sure I’m doing it all wrong, so before I burn it I would really like anyones advice on how to set it up. What is a flight controller? How do i connect the camera to a flight controller? How do i access the menu to change the camera settings? I have only managed to turn the camera on and off.

Any help would be greatly, and i mean it, GREATLY, appreciated. I’m literally panicking over this.

I’m sorry if this is the wrong place to post it.