How can I create object using class?

Hello. I am new to Unity and i want to create a prefab object using class. Unfortunetly i dont know how to spawn my prefabricated ball on the scene. Thats my code:

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

public class KontrolerGracza : MonoBehaviour {

    public class Gracz
        public int movementSpeed ;
        public int jumpPower;
        public bool jumping;

    public void Spawn()
        Gracz player = new Gracz();
        player.movementSpeed = 10;
        player.jumpPower = 900;
        player.jumping = false;
    void Start()

There is a method called Instantiate(object) (Have more “I dont know the word now” overrides). If you set it into a prefab and assign it in the inspector will work fine. Also there exists AddComponent() wich will set into the object your script class