Raspberry Pi Zero W display a web page without keyboard/mouse-3

I will try again for a 3rd time but with a twist: I have some hdmi TVs that I need to display some remote url webpage like a menu page. No mouse, no keyboard. Embedded. Boot up full page. (equal to F11 look). If can't connect or lost connection to wifi router OR external url it will keep trying. That is my minimum need. I did hire others but auto full screen and retry router/url did not work. Optional need: if mouse/key connected I need to be able to change ssid/password/url. Raspberry Pi Zero W/mouse/keyboard & hdmi monitor/TV Twist: It should be possible on power up to create a 1 minute interrupt that no other programs will modify? This interrupt needs to post to a URL and get back a certain return/response. If not then re-boot RPZW? THEN startup displaying a URL page in full screen. The full screen url will refresh on it's own. you MUST have a Raspberry Pi Zero W.