Hello! My name is***** am a computer professional with over 15 years of experience with both Mac and Windows computers, phones, tablets, e-readers and printers. If you haven't used your Kindle in a very long time, I suspect that you may have missed a mandatory update last spring for all Kindles. Without that update, older Kindles will no longer connect to the internet. My guess is that is if you try to create a new account you won't be able to because you won't be able to actually connect to the internet to do it. Do go ahead and try it since I've checked and there is no Amazon Account associated with***@******.***. If there were, I'd be able to reset the password.
If you're unable to setup a new account on the Kindle, let me know. That will mean that you definitely need the missed update in order to fully connect to your wifi.