Arm/Disarm Blink when no one is at home OR specific cover is closed OR both

Hi there, I need help for a very specific automation. We have a specific cover (terrace door) which should tell the blink cameras to get armed as soon as it’s closed. When it opens it should disarm the cameras.
I think I would be able to get this up and running but: Even if the cover is not closed the cameras should be armed as soon as we both leave the apartment. Device tracker are our phones over Fritzbox (Router) Tracker.

Cover Entity is: cover.wohnzimmer_rollo
Blink Entity is: alarm_control_panel.blink_zuhause
Device Trackers are: device_tracker.iphone11 & device_tracker.iphone13

Could you help?