The Diocese of Dunedin has put together a handy little page of karakia for those who are wanting to start with the basics. Each karakia is written out, with links to audio files where you can hear it read aloud. There are karakia for starting a lesson or hui; karakia of blessing; the sign of the cross; the Lord’s Prayer and a number of others.
There is also a link to a PDF which prints out into a booklet you can fold and keep in your pocket. Find it all here.