If it’s in the Door BP, just add audio components to it with your sounds. Then you’ll be able to play and stop the sound whenever you like. I personally like use Fade Out when Timeline is completed.
And another unrelated thing: try using and Ease node with the timeline to control rotation, with your curve as Alpha. This way you’ll have more control over the rotation since you’ll be able to set concrete rotation values. Multiplying rotator by float may work in this case, but there’s no guarantee it will work as you want in other cases. Plus you’ll have to adjust the curve for every animation, whereas with the Ease node the curve will be virtually the same, just going from 0 to 1.