I am playing a ngoni, a 10 string gourd harp. I have been happily playing various traditional African songs, but I want to progress to writing/improvisation. It seems like with the traditional setups (5 note/pentatonic scale variations) there is a big emphasis on maintaining rhythms, playing against rhythms, and leaving/returning to rhythms. But I'm trying to figure out some other ways to explore improvisation. Any advice?