Electronics prototype circuit and code don't work - it's confusing

You are trying to achieve too much in one go.

SO to start get the buttons to control the LED. My page here will show you how to connect them.
Driving LEDs with an Arduino microcontroller (Fig 1)
Digital inputs on an Arduino microcontroller (Fig 1 - switch to ground and input configured as pull up.

getting an LCD to work may not be so easy.

You will need to draw a schematic - to help US and also you.