If your goal is spiritual preparation (Advent), "preparing for joy" often means making internal space:
You can find printable or editable versions of these lyrics for classrooms or caroling on sites like Twinkl. 2. Heartfelt Greetings & Messages Joy for Christmas
If you are preparing a text for a sing-along or a program, the first verse of is the standard reference: If your goal is spiritual preparation (Advent), "preparing
For a holiday card or text message, you can focus on spreading cheer to friends and family: and Heaven and nature sing..."
"Joy to the world, the Lord is come! Let earth receive her King; , and Heaven and nature sing..."