Using the Animator controllerl in a FPS

Hi, I'm writing this topic because I tried to use the animation controller for the first time. Now, , that's not a platformer, then the player can walk/run forth, back and by side.

So, I created a Blend Tree with three animations: walk right, left and forth; ther's an another one named backWalk, but I didn't inserted it in the blend tree. I want to create a fps, so the character has to play 4 different animation vis - a - vist to the movement direction.

Moreover, I found a script to turn the camera with the player, but the controls seem not follow the camera, infact, if I look toward left and press W, the player walk left.

Some help? Thanks