What a coincidence, I just realized I'd like to learn patois too. Haven't done much, but noticed One Stop Jamaica has a vocabulary list posted on their website. I have no idea if the list is accurate. Started listening carefully to music and reading lyrics on Damien Marley's YouTube videos. Practice singing a long. Listening to different accents, soaking in the sounds, rhythm and tone. I'm impressed by the musical quality. Some of the expressions are beautiful. A Jamaican friend tried to teach me a few expressions.