Hi my name is ***** ***** Dr.Fix-It , Your online expert ready to assist you...
Please first plug in your Kindle and while still plugged try a basic reset / restart per steps below:
Press and hold the Power button for a full 45 seconds.Only release the Power button after 45 seconds.If your device does not automatically restart after another 30 seconds, press the Power button to turn it on.
Once have the Kindle restarted it should already be registered to your Amazon account and will not ask you for your Amazon password.. if however unable to connect to your home WIFI wireless and is secured, may ask for the wireless network password ***** allow your Kindle to connect to the internet. If recently change your your WIFI router or password, then yes will need to be updated, on the Kindle keyboard there should be option to switch from numbers / symbols to letter characters... Please let me know which Kindle you have: standard Kindle with single controller button on front, Kindle Touch, Kindle Paperwhite, or Kindle Fire with color screen?
Please give it a try and let me know if have any questions along the way with a reply....only rate my answer ok, great, or EXCELLENT after we have worked on the issue together to your satisfaction. Bonuses are welcomed & appreciated. I look forward to any future inquires as well, Thank You