Here's the website I used for the words: https://www.lobvm.com/hours/roman/1962/office-1/la-en/vespers/
If you're on a mobile phone, click "Settings" to pick Latin if you like.
The Little Office is designed to be sung. Speaking through the words first helps you get the hang of the pronunciation. It's like learning to walk before you run. I have more videos on singing the Little Office.
See: https://littleoffice.brandt.id.au for more details.
