At the circulation desk, ask, "I'd like to check out the Native American flute, one of the instruments on Permanent Reserve." The circulation assistant will retrieve the item for you and have you sign our small responsibility form.
We have several older books on Native American music such as this one; consider it the beginnings of ethnomusicological research in that genre, and note that some of the music those researchers had access to no longer exists anywhere.
Beginning native flute lessons:
Tip: remember when you learned to search for your topic plus inurl:edu, inurl:gov, or inurl:org? Those strategies may help you here.