Transistor Sword with Sound

I'm a total newbie when it comes to programming and boards. I've only done some basic sautering and cannibalizing of existing boards. So I'm looking for help figuring out where to start.

I have built the Transistor sword and have leds running along the inside but I'd like to have voice clips that I can press a button to activate and have the lights pulse/brighten in time with the voice clips.

Any ideas for what board and accessories I will need to do this project? And any tutorials for similar projects?

Thanks for any help or advice you can provide!

Voice clips: a WAV/MP3 player such as a DFPlayer.

LED brightening: depends on how your sword is wired, and whether that are regular LEDs or individually addressable ones.

Some buttons.

Based on the limited info, just about any Arduino would do for this. Start with an Uno or Nano.

That's a pretty cool looking sword, by the way.