start over ....setting up new ipad

We purchased this IPad yesterday. We went through about half of the setup and then decided that the user name that we first typed in was the email address that both of us have used up until now.

I wanted my own email address and my own Apple ID...without tying it back to the older accounts.

I have established a new, working, gmail account and I want that to be my apple ID. I have established a new apple ID with that new email address as its "title".

However, since we are half way through the IPad setup...there doesn't seem to be a way to go back and amend the original, incorrect, applie ID that we typed in. How can I wipe the slate clean and start over with the newer correct ID and passwords etc.

Is there a simple reset button? Thanks