Weeeeel Dude, I think you need a good plan and the first thing is having something (with a registered copy right) to sell!

Then it is publicity time, need something to drum up some interest (clips of songs maybe a min. converted into mp3) then a platform to jump off. (sell CDs, stream music)

Places like:
nowhereradio.com
songramp.com
mp3.com

can all help with this process but first, Id sort out a website that allows you to sell CDs / merchandise on line.

Also some of the more well known internet radio stations (like radioIO are good targets for complementary CDs)

Any publicity is good publicity, and target your audience!

Best of luck dude !