Answer 1

Here's the example. I used a button. You can try using body instead.
https://code.sololearn.com/WYQWv9z9cndF/?ref=app

Answer 2

https://code.sololearn.com/WxPVZz819g1O/?ref=app

Answer 3

You are not forced to add controls attribute for the audio. Add the onclick event to the body tag. You can use the play fumction [.play()] to play the song; that's so easy