My state of mind with this game

[AdherentToast91]

Watch a full flight and you can learn a lot from this : See the sequence of process and you will also need to press the LNAV on the Autopilot panel.

Heathrow to Dubai First Full Flight | Flight Simulator | FS2020 | Boeing 747

And also :

FS2020 - Boeing 747-8 Autopilot Tutorial