Continuing the discussion from DJI Fly App Alerts:
There is some rather misleading information in this thread. There is a better explanation of Class D Airspace on this thread:Class D airspace?
Basically with your drone you don’t have to be concerned.
You can also look at:
https://dronesaferegister.org.uk/blog/hiring-a-drone-operator-guide-to-understanding-airspace/
Peter