Hi,
I have 4 years experience in flying DJI drones ( I had 7 altogether) I still have 2. 2 lost in action and the other ones sold. I never had a faulty motor, maybe you had one but be very careful when attaching the propellers.
I am back to my P3's which never let me down. I love the thread way of attaching the prop. Can't go wrong here.
Sensors? I almost lost a Mavic Pro because it was not respecting the Litchi Mission speed due to the use of "collision avoidance" sensors..... At least turn off that function which triggers landing when very close to the ground or what thinks is ground, forgot what the name is. This will save you from landing unintentionally on roofs, power lines, water and so on.
Take it easy, fly around you first and take it gradually farther and farther away. Learn about the wind and how it affects your aircraft, this is no 1 killer I believe for new pilots who jump straight on long-range flights or "helps" them crash on the side of the neighbor's house. I did both on my first 2 months.
Make sure you know what Atti mode is and when it is triggered. Even if you do not have the option to select it, it will still kick in if you have compass or GPS issues. This will explain to you what the feared "fly away" is. Is it just auto-switching to Atti mode (this is the hold of altitude only-
not position) and the drone goes where the wind takes it.
Losing a drone can be very frustrating, so use a learning curve

which greatly reduces the chance of going around unfriendly terrain looking for your baby.