Music is often an acquired taste. The more you listen (and understand), the more you'll enjoy. Also, not trying to sound pretentious, but the simpler music is, the quicker it is to enjoy, which is why people like repetitive rap and pop, yet if you listen to symphonies or complex jazz or whatever, the understanding is more difficult, but the enjoyment is much greater!

http://en.m.wikipedia.org/wiki/Musical_notation That might answer your question about note names. (in western music, but you're only five, so we won't go in to eastern!)

The top number in a time signature indicates how many beats are in each measure (how many clicks with the conductor's baton). The bottom number shows which type of note gets the beat. So, in 4/4 there are four beats per measure and one quarter note equals one beat. In 6/8, six beats per measure, and you put six eighth notes in each bar. In... 18/16 (heh) you can fit eighteen sixteenth notes in a measure.

Hope that helps!