Hello, big Arduino noob here!

I'm currently working on a cosplay prop (a staff that lights up and plays a sound once when turned on), I have used the wiring and code shown in this video ( https://www.youtube.com/watch?v=PBdqgHj_AkU ) but I find the delay between turning on the system and the sound finally playing pretty long (~3 seconds)...

Is there any way to shorten that duration?