You're welcome.
$1 if you need anymore help, but sometimes, I find reading through accessibility tips a lot more frustrating then listening to someone, such as the Blind Life, explain them.
As I've said before, my experience lies with Apple and I really like Apple tablets and phones because of the support I've gotten from them over the years. Currently, I'm writing up a suggestion for Apple to make Spoken Text Speak Screen Speech Controls useable by Siri commands. I would love to be able to say "Siri, slow down speech to 68" when I need sections or commands read slower and then say "Siri, return speech to speed" to return my speech speed back to my default speed of 80. But I digress.
My point is, a lot of these companies love constructive feedback and have people working for them that love helping customers set up their devices. It makes them happy that they were able to contribute to something positive in someone else's life. If kindle is going to become your sister's main tablet, then looking up how to contact accessibility support might be good.
I reached out to Apple to see if Siri was capable of doing speech speed commands and their customer support spent a good 20 minutes verify that this feature did not already exist by using her practice device. Once we determined that it did not work, she helped me compile a feedback report so that developers might take my suggestion into consideration.
Amazon/Kindle has a similar department you can call and ask how certain features work, how to customize features to fit your needs, and walk you through how to use their accessibility features. That number is
* 1-888-283-1678
This will connect you to Amazon’s Accessibility Customer Service and to an accessibility specialist who can help you buy books and other products, or get you directly to tech support for Amazon devices and services including Alexa, Kindle & Fire Tablet. They won't help you with anything that isn't accessibility related as that is what regular customer support is and they're not trained on other types of issues.
If you ever need accessibility help with any other company,
$1