Epic Shamisen Song, Nagauta
Noun
ながうた
長唄教室に通い始めました。
I started to go to the nagauta class.
A long shamisen song is a long shamisen song! They're also called nagauta, and they're usually pretty epic too.
The readings for this word are both kun'yomi readings. You learned them when you learned the kanji, so you should be able to read this on your own.