Hi! There is no HP system. Getting Hurt works pretty much just as described: if a PC becomes Hurt during the game they have Disadvantage on any Action affected by the injury. So for example if they injured their arms they will become Hurt and have Disadvantage on any subsequent Actions that require the use of their arms (e.g. climbing, lifting a heavy object, etc.). Hurt can also be caused by emotional or psychological injuries (e.g. a PC’s pride or self-respect can be hurt). The Hurt condition can stack, meaning the more Hurt a PC becomes the more and more difficult it will become for them to perform Actions until they are healed and the condition/s removed. I hope that’s cleared things up 😊