Compass calibration? Are you taking off from a steel structure or concrete with steel rebar in it. You shouldn't have to do a compass calibration ever or very seldom.
Some type of silicone spray might help loosen it. WD-40 makes a silicone spray that seems to penitrate very well and will dry up and not attract dirt after while.
I've hooked mine up to a TV to act as an extra monitor for bystanders to watch. After hooking it up you need to enable the HDMI port in the settings. It's been a couple years but it was simple to get it working if I remember correctly. The TV was...
You have download all of the DJI apps from their website now, they no longer post them in playstore or Appstore. Any dji mini drone is not that old, but that's coming from someone who still flies a Mavic Pro and a Mavic 2 Zoom all the time. Still...