Welcome.
First thing, downlaod the control app Go4 from either
DJI GO 4 - Download Center - DJI
or if you have an android phone
Download DJI GO 4-For drones since
P4 APKs for Android - APKMirror Free and safe Android APK downloads
www.apkmirror.com
DO NOT download it from anywhere else.
Play with it on a phone even if you are getting a drone with a
smart controller
Download and read, MANY TIMES, the drone's manual
There is A LOT in there and I would bet you will miss stuff, or miss the significance of stuff, on the first few read through.
When you get the drone DO NOT rush out and try to fly it.
I suggest you compare the manual with the working Go4 app when connected to a live drone.
Direct the output of a fan over the drone to help keep it cool.
DO NOT bother about updates at the moment and decline any that are offered.
Check that the following options are set
Beginner mode ---------- is set to off
"RTH at Current Altitude" is set to off that's a debateable one
In "Adavanced Settings"
"Emergency motor stop" is set to "Breakdown" AND NOT "Always"
"RC Signal Lost " ---------- is set to "Return to Home" = RTH
Personally I would switch OA, obstacle avoidance, OFF.
It nearly cost me my
m2p on its first flight, or rather, my not knowing it was on and what it would do, nearly cost me the drone.