Smooth Ladder (collision) (3d)

Hello guys im trying to create a simple ladder script but the problem that i have rn is that when my player goes up the ladder he starts glitching around because the collisions are touching how can i make it so the collision of the ladder and the player touch but it's smooth???

gif that shows what's going wrong:
https://gyazo.com/7559a665278f85dc6330a797b2ff2796

Scripts:

Code (csharp):

1.  
2. using System.Collections;
3. using System.Collections.Generic;
4. using UnityEngine;
5.  
6. public class Ladder : MonoBehaviour
7. {
8.  
9.     GameObject playerOBJ;
10.     bool canClimb = false;
11.     float speed = 1;
12.  
13.     void OnCollisionEnter(Collision coll)
14.     {
15.         if (coll.gameObject.tag == "Player")
16.         {
17.             canClimb = true;
18.             playerOBJ = coll.gameObject;
19.         }
20.     }
21.  
22.     void OnCollisionExit(Collision coll2)
23.     {
24.         if (coll2.gameObject.tag == "Player")
25.         {
26.             canClimb = false;
27.             playerOBJ = null;
28.         }
29.     }
30.     void Update()
31.     {
32.         if (canClimb)
33.         {
34.             if (Input.GetKey(KeyCode.W))
35.             {
36.                 playerOBJ.transform.Translate(new Vector3(0, 2, 0) * Time.deltaTime * speed);
37.             }
38.             if (Input.GetKey(KeyCode.S))
39.             {
40.                 playerOBJ.transform.Translate(new Vector3(0, -2, 0) * Time.deltaTime * speed);
41.             }
42.         }
43.     }
44. }
45.  

Code (csharp):

1.  
2. using System.Collections;
3. using System.Collections.Generic;
4. using UnityEngine;
5.  
6.  
7. public class characterController : MonoBehaviour
8. {
9.     public float speed = 9.0F;
10.     public Vector3 jump;
11.     public float jumpForce = 1.0f;
12.     public bool isGrounded;
13.     Rigidbody rb;
14.  
15.     void Start()
16.     {
17.         rb = GetComponent<Rigidbody>();
18.         jump = new Vector3(0.0f, 7.0f, 0.0f);
19.         Cursor.lockState = CursorLockMode.Locked;
20.     }
21.  
22.     void OnCollisionEnter(Collision collision)
23.     {
24.         {
25.             isGrounded = true;
26.         }
27.     }
28.  
29.     private void OnCollisionExit(Collision collision)
30.     {
31.         isGrounded = false;
32.     }
33.  
34.     void Update()
35.     {
36.         float translation = Input.GetAxis("Vertical") * speed;
37.         float straffe = Input.GetAxis("Horizontal") * speed;
38.         translation *= Time.deltaTime;
39.         straffe *= Time.deltaTime;
40.  
41.         transform.Translate(straffe, 0, translation);
42.  
43.         if (Input.GetKeyDown("escape"))
44.             Cursor.lockState = CursorLockMode.None;
45.  
46.         if (Input.GetKeyDown("space") && isGrounded)
47.         {
48.  
49.             rb.AddForce(jump * jumpForce, ForceMode.Impulse);
50.             isGrounded = false;
51.         }
52.  
53.     }
54.  
55. }
56.  

 

It looks like you might want to turn off rb.UseGravity while on the ladder.

 

since im kind of a nooby in c# how should i do that??

 

Well, in oncollision enter you do:
rb.useGravity = false;

and exit make it true.
https://docs.unity3d.com/ScriptReference/Rigidbody-useGravity.html

 

it says that it can't find a rigidbody how can i like to my rb?

 

This would go on the character script. You already linked to your rigidbody and gave it the variable rb. In OnCollisionEnter, you test for a collision with a tagged ladder. If it's a ladder, you set the rb.useGravity to false.