Welcome to Android Central! Any wireless charger should work--you need to make sure it's positioned correctly. Some phones can be a little finicky with the positioning. When it starts charging, the screen shouldn't change, although it might light up if the phone was asleep to begin with. There's typically a 3-tone sound when charging starts, and you should just see a lightning bolt appear in the battery icon in the notification bar.
By the way, this is based on my experience with the Nexus 5, but I don't think other phones do anything drastically differently when charging wirelessly.