hi.
it tunes the same as the ukulele, but different octaves
tuning is the same GCEA. so the chords n positions n soloing is all the same.
in hawaiian ukulele, the 2 outer strings are high pitch and the 2 middle strings are low pitch.
the tahitian ukelele goes all the way round, the 2 middle pair of strings are higher than the outer pairs of strings.
what strings are you using? 040, 045?
what picks are you using? 038, 041???
search for the videos of kanua in youtube, he explains the basic things you need to start.
this is me with my ukelele
http://www.youtube.com/watch?v=28O2MOfk7ss