There are many varieties of good music that you may not be familiar with. I have tried to touch upon the major directions that a hopeful musician can take. There are many variations on the ideas mentioned here. And I have probably missed a few important outlets as well. I strongly urge you to go to Borders or Barnes and Noble and get a few books that deal with the music industry.
Some books serve as how-to manuals for putting together, packaging, and promoting a music group.
There are also plenty of books that relate anecdotes about famous musicians, or tell the history of a particular orchestra. These are enjoyable to read, and also help paint a picture of how musicians work together. It is practically an obligation to paint a pessimistic picture of careers in music when answering your question. So, unless you are already financially independent, earning a living wage for your music-making must be a consideration. I do admire your idealism, though.