I’ve not used Secure Settings so I don’t know. If you want to have the screen wake up with motion and turn completely off then you can follow e10trans directions in post 52. It requires replacing the stock firmware.
If you can live with the screen dimming and not turning off, you don’t need to replace the stock firmware. Instructions for that are here: FAQ: Affordable Hardware Dashboard
Has to be in a browser; people use browsers that offer a full screen or kiosk mode. I use Kiosk Browser, but Dolphin seems to be a popular free choice.