Why not wander over to your local music shop and ask for a CD of the Vienna Boys Choir, and also one of a boy soprano singing some of the classical repetoire? (Or check whether your local library has CDs for loan - an even cheaper option).
Choose one or two of the pieces you like best, check which composers wrote the pieces and then find one or two cheap recordings by those composers. (The library option gives fine recordings at no financial risk).
Within no time at all you will have established what sort of music you like, and what sort of music you don't particularly like. From there the experience grows into a fascination at an 'alarming' rate, especially for your wallet.
Moira, the Faerie Godmother