hi I’m currently changing my light switches to WiFi switches to work with Alexa. My kitchen switch is a 2 gang switch and dimmerable (2 switches) Can I can this to a 1 gang and how? Or does it have to be a 2 gang switch? Also at the top of my stairs is 1 gang 2 way switch so it can be turned on/off at the bottom and the top. Can this be changed to any switch or are there 2 way switches? There’s currently 2 yellow/green wires in each.