To a greater or lesser degree, everybody loves music. We all have different tastes, and the argument about the Beatles vs The Rolling Stones will probably continue until the end of the human race, but there's something out there for everybody. And all of it needs reviewing. Bands - especially unsigned bands - rely on reviews for their press kits and advertising. Because they need them, they pay for them.
You can sign up to become a reviewer on slicethepie.com, and potentially begin reviewing music straight away. It takes a while to see a good financial return, but every trustworthy review increases your ranking as a scout, and the better reviewed you are, the more people will want reviews specifically from you. You have ears, and you've listened to music before, so as long as you can write a good descriptive piece, this could be a whole new career.