Make multiple Projectiles move at the same Time...

Hello there,
I'm making a 2D, top-down dogfight game and I have a script that makes my fighter shoot.
It only Instantiates the projectile sprite yet. Now, I want the projectile to move, until it hits an object. Here is when I need your help! My fighter can only shoot one Projectile each second, I made a coroutine for that. But how can I make each projectile move.
Here is what I got so far:

 void Update () {
     if(Input.GetKey(KeyCode.Space) && !shooting) {
         StartCoroutine(shoot ());
 
 
     }
     
 }
 
 IEnumerator shoot() {
     shooting = true;
     Instantiate(shot, transform.position, Quaternion.identity);
     yield return new WaitForSeconds(1);
     shooting = false;
 
 }

Hope you can help me! Thanks in advance...