Hard time with 360 Controller

I’ve done some searching around and noticed a lot of questions about things like button mapping, but I haven’t been able to find anything on getting started.

I have an FPS style game. I’ve already been able to set up the 360 controller to work with moving and camera rotation, but I can’t seem to figure out how to get buttons to operate.

Is there any guides out there that can help me with this? I’d ideally like to use just the A button and the Start button.

the A button should be joystick button 0, and should be set as a joystick thing, not a key or mouse button.