Using a trigger to make 'Play button' for video disappear?

I included the file I'm working on.  I am referring to the 4th slide - the talking head, me! I created the audio in Canva.  Not sure how to sync the audio so that when the button is clicked the audio begins. I was able to figure out how to get the button to disappear when it's clicked but the audio begins when I proceed to the slide.  I was thinking maybe I need to do this in Canva, but I should be able to make this change in SL.

Please advise.

Thanks!