Question How to start an animation

Hello, I am new to creating a Unity project. To begin with, I used the ThirdPerson template already available on the software which allowed me to already have a character who runs, walks and jumps.
I wanted to implement an animation for him to crouch, but I don't know how to bind it to a key. I did add the key for crouching and I put the necessary lines of code, but I don't know how to link all that to this animation so that, when I press the key, the animation plays and he crouches. Do you have any solutions?
(Sorry if my English is bad btw)