Charge Effect/Power Up

How can I do a power up effect? I made a new actor , added particle effect and sound. After that I did this in blueprint . Could you please give me some advices?

Now , how can I attach an effect/sound to this blueprint? I’ve tried something but it gives me an error when I’m compiling. Any other solutions?

Feel free to multiply or add a base Value to the Charge before Launching

Thanks a lot man. Appreciate your effort.