It all depends on how much time you have and what your end goal is. Do you want to be a web developer for your career or just a hobby? How much time do you want

It all depends on how much time you have and what your end goal is. Do you want to be a web developer for your career or just a hobby? How much time do you want to put into this web app? Python/Django/Flask or Ruby on Rails are both great choices but I would go pick up the book or search on the internet for a book called PHP Apache and MySqL web development by Wrox. They walk you through building a web app for a music collection which is just what you want anyway.