It's not that cumbersome to send articles to your Pocketbook. I use the Fivefilters.org browser extension for Firefox. When I have an article I want to send, I just click on the icon in my toolbar, wait for the sending page to load and click send. The email address stays in the address field, once you enter it.
AFAIK, Pocketbook uses IVONA TTS. You can hear examples here:
https://nextup.com/ivona/
For TTS to work the books have to be opened with the original Pocketbook software reader. (KOreader and Coolreader can also be installed but don't have TTS.)