If you get an audio guide you can essentially start right away. If you have a streaming service, search for 'mindfulness'. On Google play there is one from Oxford. They used to have several albums from Kabatt-Zinn but they seem to have disappeared. I would recommend those. In any case, make sure to purchase so you are not interrupted by ads.

If you want to do a bit of research there is a YouTube video of a Kabatt-Zinn talk at Google where he leads a short session.