First things first: read the game manual! Everything you need to know about basic game mechanics in The Order: 1886—game controls, options and settings, the HUD (heads-up display), how to use specialized weapons, and so forth—is detailed in the manual. Our basics section focuses more on how best to play the game.
That said, let’s start with a diagram of the PS4 controller and lists of the menu, movement, and combat controls. It never hurts to have an additional reference source.