Trying to identify these wires on a switch
Someone else will probably post a more complete answer soon, but you need to figure out which of the black wires on your old switch is always-hot, and which is hot only with the switch on.  Always-hot connects to live on your new switch, and switched-hot connects to SW1.  Neutral gets added to the white wire bundle in the back of the box, and ground connects to a screw into the metal chassis (because the conduit is your ground here).