Moving Character to mouse click with Rigidbody2D!

Hello guys ..

I'm building my first game ever ^_^ .. just a simple 2D game .. Now i'm implementing the character movement .. The idea is (when i click somewhere in the Screen or the scene , the character goes to that click position .. and if there is no new target .. the player falls down ) .. i tried to move the player using Rigidbody and AddForce method .. but it didn't work .. because the character keeps accelerating and there are a lot of weird stuff going on with that way .. So now i'm moving the character using transform.position ., and it's work .. this the code ..

 public class Player : MonoBehaviour
 {
     [SerializeField]
     private float _speed;
     private bool _move;
     private Vector3 _target;
 
     void Start()
     {
       
     }
 
     void Update()
     {
         if (Input.GetMouseButtonDown(0))
         {
             _target = Camera.main.ScreenToWorldPoint(Input.mousePosition);
             _target.z = transform.position.z;
             if (_move == false)
             {
                 _move = true;
             }
         }
         if (_move == true)
         {
             transform.position = Vector3.MoveTowards(transform.position, _target, _speed * Time.deltaTime);
         }
     }
 }

But in this way .. the character reach the target but doesn't fall .. because there is no Rigidbody2D ..

How can i add rigidbody2D to make the character fall when reach target .. without ruining the whole movement ??