Thanks, MaceM. I actually did imagine singing it to the music but I am not any kind of musician...just a wannabe. In the end though, for me, it’s more about the message than whether or not I have all the scans right.
You don’t have to be a musician to write a parody, though perhaps an ear for poetry might be helpful.
If you’d like to improve your skills, you might want to listen to pros like Paul Shanklin and Weird Al Yankovic.