Ability Animation System

Hi! I'm creating an RPG-like game but I have a problem. How can I create a good system for animation that are played when I do an ability? For example when I press 1 I know I can set just a trigger and set it in the script when pressing the number but I think there is a better way of doing it in a blender tree or sub-state machine. If it exists, can someone tell me how do it or link me a video?