I don't mean to comment hop, but I've got a tutorial on webs over here, and if you're signed into your account, you can go here to downgrade to html if you're stuck in their premade layouts mode (I haven't used that second link, but several friends have, and they said it works, so it should work). Once you get it downgraded, you just have to do what I have in the tutorial, which is made a page and edit it. No need to upload anything. I will say if you have information already on the premade layout, save it because I do not know that it will be saved when you downgrade.
Again, I didn't mean to comment hop, and I'm sorry for doing so! Obviously feel free to delete this if it's a really big no-no.