But those lyrics you quoted - those are not the Watusi. The first two warn you that the Twist and the Fly are not hip dances and won’t make you popular. The last suggests that doing the Watusi instead can augment your romantic life. There’s no instructional content in the song - you’re going to have to look elsewhere for that.
I’m not sure about the steps - I assumed it was inspired by a particular African dance, but that could be wrong.