Mastering the controls is crucial for survival. The default keybindings are standard for first-person shooters, but you can customize them in the 'Options' menu. Familiarize yourself with movement (W, A, S, D), sprinting (Left Shift), crouching (Left Ctrl), and proning (Z). These movement options are vital for stealth, avoiding anomalies, and taking cover during firefights.
Interaction with the environment is primarily done via the 'Use' key (F). This includes picking up items, opening doors, and interacting with NPCs. Your flashlight (L) is indispensable in dark areas, but remember it can also give away your position. Always be aware of your stamina bar; sprinting and jumping consume it rapidly, and a depleted stamina bar can leave you vulnerable in dangerous situations. Practice these movements in a safe area before venturing into hostile territory.