Mastering the controls is fundamental to navigating Paragon City and engaging in combat. The default controls are intuitive and similar to many other MMORPGs. Use W, A, S, D for forward, left, backward, and right movement respectively. The Spacebar is for jumping, and holding it down often allows for higher jumps or initiating flight/super-speed if you have those powers. The mouse controls your camera view; left-click to select targets, right-click to rotate the camera, and both buttons together to move forward.
Other important keys include Tab for cycling through enemies, Ctrl + Tab for cycling through allies, and 1-9, 0, -, = for activating powers on your primary power tray. You can customize all keybinds in the Options menu (press Esc). Experiment with different settings to find what feels most comfortable for your playstyle. Understanding these basics will make your early missions much smoother.