how do i provide low and high inputs
First of all, your digital logic IC needs power as well, of course. Second, your LED needs a resistor - it's probably blown up already. The switch should be done more like this:







simulate this circuit &ndash; Schematic created using CircuitLab

If you want to keep the switch in the way it is, where when the switch is "on" the input to the gate is "HIGH", then you can do it like this, and still have a valid signal when the switch is not pressed:







simulate this circuit

In the second way, the LED will be always ON until the switch is pushed down, and while the switch is down, the LED will be OFF.