Dear Cara, Here is a site for you:This is the site of Standing Stones, a musical duo who perform traditional Celtic music. Michael Robinson of the duo has the site well organized with tons of information about music thoery, language, history, you name it.
He has a section on Irish. I have emailed him several times and he has always been helpful with his answers to questions.
Let me know if you find this site helpful. I'm curious.
Margarita