User Story Mapping accredited courses

Hi,

I'm currently reading Jeff Patton's 'User Story Mapping' and am looking for an accredited course to take to further develop my knowledge and confidence in order to give a go at making an income from User Story Mapping. There are a lot of one day courses, many of them expensive but seem to be lacking depth and quality.

I've been a programmer / dveloper for the last 8 years but am new to the world of Agile.

Thanks

Daniel