I gave my 90 year old grandmother an Echo Show for Christmas and she loves it. My main goal was video chat (which she can also initiate herself), but she’s actively using it as a radio, weather station and calendar for the trash pick up.

To help her remember the commands I made a reference sheet with the most common phrases, but what mainly helped her was to think of talking to Alexa as if she was talking to a dog: Giving clear, loudly spoken commands.