First time using the animation is delayed.

So, pretty much what the title says. I'm pretty new to Unity overall and even more to animating anything.

This is my animator tab. I transitioned from "Any State" to "AttackAnim" with a trigger. But, in game, the first time I click (which triggers the trigger) the animation has a certain delay before it actually starts.

I noticed it waits for the Idle animation to end (which doesn't really need to be there, since the animation is empty), and then, after finishing the AttackAnim animation, it doesn't go back to Idle.

I'm pretty sure there's something simple that I'm just missing, if you could point me to the right way, I would appreciate it.