Community Central:Sandbox

At first I was confused and maybe I still am. Assignment #5 is to create an account on "one" site that uses Wikis. I chose LyricWiki because I love music and love to sing along and it's nice to know you are singing along with correct lyrics! Next, find its Sandbox page and use it to modify some text. I found where to Sign In or Register. Upon clicking on Register, it took me to Wikia and had me confirm my email. Once I confirmed my email, it brought me here to Wikia Community Central. Under "Contribute" it has an Edit choice, but I thought this was too easy. So I clicked on "Need help editing?". The Assignment says to find the "Sandbox" and modify text. I then typed Sandbox in the "Search Community Central". The directions were the same for Editing as modifying text in the Sandbox. In conclusion, I am typing this explanation and hoping I am completing Assignment #5 correctly.