Albert Lua provides a nice and quick way with much elaboration for beginners on how to startup the PMDG 737 NGX, a difficult aircraft for many.

Link to the livery is available at https://fandagear.ga/pmdg737ngx-repaint/ by Albert Lua as well.

For those who wonder, the addons used are PMDG 737 NGX (obviously), GSX by FsDreamTeam, FlyTampa St. Maarten, and EZDok Camera.