It’ll be easier for you to play sounds without an audio component. Check out PlaySoundAtLocation – just need to get the position you want to play the sound at, then play it. No need to deal with audio components.
If you want to play a sound attached to a scene component, it’s probably easiest to use SpawnSoundAttached.
You really only need an audio component if you need to modify the sound while it’s playing – either to change volume, pitch, or stop a looping sound.
In your case, if your low-health warning is indeed a looping sound, just use the SpawnSoundAttached, set your audio component local variable to the audio component that is returned by that BP function. Then in the false case, where you want to turn the loop, check if the audio component variable is valid, and then call stop on it.
