Help on applying animations to tools? (specifically an idle stance)

I'm currently making a game about hockey and need to have an idle stance animation for goalkeepers so when the stick tool is equipped and they are standing still, they are cycling through the pose/animation that i wanted. I need help on these things:

1. How to make it so when the tool is equipped and i am idle, the animation plays.

2. Any animation tips would be handy.

Please keep in mind that i have absolutely zero experience in scripting and i have literally no idea how any of it works and learning it makes zero sense to me. I would like to learn to script but it's way too complex for me.