Problem with Trigger an animation

Unity Engine
,
1

Hey Guys, I recently started to learn Unity and I´m with the first problem that I can´t fix by myself. I guess is something basic, but I don´t know the answer. I swear I tried to find the solution by my self, but I can´t find it.

So, the idea is the following. My character moves using the normal input (this works perfectly), but when the player collision with a gameobject (a barrel) should activate a trigger and change to an automate script/animation. But doesn´t work, because there is like a invisible wall and after some seconds, the trigger activate and the script/animation works… But, obviously, I want to move normal until I reach the barrel, and then activate the trigger.

using System.Collections;
using System.Collections.Generic;
using System.Numerics;
using UnityEngine;
using Vector3 = System.Numerics.Vector3;

public class Walk : MonoBehaviour
{
    private Rigidbody2D Rigidbody2D;
    private float Horizontal;
    private Animator Animator;
 
    // Start is called before the first frame update
    void Start()
    {
        Rigidbody2D = GetComponent<Rigidbody2D>();
        Animator = GetComponent<Animator>();
    }

    // Update is called once per frame
    void Update()
    {
        Horizontal = Input.GetAxisRaw("Horizontal");

        if (Horizontal < 0.0f) transform.localScale = new UnityEngine.Vector3(-1.0f, 1.0f, 1.0f);
        else if (Horizontal > 0.0f) transform.localScale = new UnityEngine.Vector3(1.0f, 1.0f, 1.0f);

        Animator.SetBool("walk", Horizontal != 0.0f);

    }
    private void FixedUpdate()
    {
        Rigidbody2D.velocity = new UnityEngine.Vector2(Horizontal, Rigidbody2D.velocity.y);
    }
    private void OnTriggerEnter2D(Collider2D collision)
    {
        if (collision.gameObject.name == "barrel");
            Debug.Log("Trigger Activado");
            Animator.SetTrigger("test");
    }

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2 
   private Animator Animator;

try lowercase for the variable name. I think you are referring to the class now in your code when you do “Animator.”