I have tried all the X series. They are known for ‘steep’ learning curves and insanely awkward controls.
But the games are amazing. True living sandbox.
X4, has the most ‘intuitive’ control structure of all the games in my opinion. But still expect a steep learning curve. I think it took me 10 hours to get ‘comfortable’ with how everything was expected to work. But then I am a dummy. You might pick it up earlier.
This is the closest you will ever come to being a starship Captain or Admiral.