Can't log in to the App Store

So I'm new to apple, and I created my Apple ID, but when I go to the app store and try to log in, a message appears that says "This Apple ID has not yet been used with the App Store." So I click in "Review" and I start it starts loading, but then another message appears that says "Please enter your Apple ID and password to create an iTunes Store account from your existing Apple ID, so I put my account and password again, and it brings me back to the first message "This Apple ID has not yet been used with the App Store." And then I get stuck in the same loop. Can somebody help me?