Help with collisions

Im trying to make a top down game but the tutorial series im following's movement script didnt work so i made my own, and now, im here in the unity forums asking for help, anyways how do i make my player have collisions if it's movement script is this

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PlayerMovement : MonoBehaviour
{
public float moveSpeed = 5f;
public Rigidbody2D rb;
Vector2 movement;
public Animator animator;

void Update()
{
// Input

movement.x = Input.GetAxisRaw("Horizontal");
movement.y = Input.GetAxisRaw("Vertical");

animator.SetFloat("MoveX", movement.x);
animator.SetFloat("MoveY", movement.y);
animator.SetFloat("Speed", movement.sqrMagnitude);
}

void FixedUpdate()
{
// Movement

rb.MovePosition(rb.position + movement * moveSpeed * Time.fixedDeltaTime);
}
}

please help as it would mean a lot, a little info is that im trying to give collisions to a layer called Solid Objects.