What is the difference between a normal takeoff / normal landing and his combat counterparts?
The answer is for sure pretty simple and maybe supprising for you.

By the way.
I am not a military pilot and never flown even combat like missions. But it is not that difficult to see the differences.

Is this the right time to talk about Combat takeoff and landing during flight training. Maybe not in the first few.
But there is another, more vital aspect that needs to point at any time.
Fling a helicopter is not only moving an aircraft from one place to another, which is only a matter of training. More critical is that fling a helicopter is, much more than an airplane, a constant decisionmaking process.

ETG or TOT limit may exceed in DCS for 2 minutes, while in real life for 20 minutes if naccesarry.