Not to hijack, but if folks are interested, I built a similar project based on a very similar premise, but since I had a old touchscreen monitor laying around and some woodworking experience I used a raspberry pi, LineageOS, along with Nova Launcher to build a similar implementation based on android. I posted about it here if interested.
https://www.reddit.com/r/raspberry_pi/comments/1ik3myy/turni...