Change projectile speed after spawned unreal

I’m Trying to spawn a projectile with the R key and then when i click the left mouse button it shoots. i want to get up to 5 projectiles to spawn and each click of the mouse it shoots one leaving the rest until i run out. Once all of them have been shot i want to have them respawn on their own or hit R to respawn them. They have to stay with the character though like if i move forward they move forward as well, but then they don’t act as a Projectile until i hit the mouse button. really new to unreal and all i can do is get a custom projectile and move where its being shot from but i need it to be a two step thing.