I don't know anything about recording or studio work. I just recently learned that some people connect audio interfaces to their computer in order to record vocals or instruments. I'm no expert when it comes to audio recording software. For quite a while, I've felt that Audacity is enough for me, but now I'm trying to learn Logic Pro 9.
My point with all this is that if I can write and record songs, so can you. If you don't want to play an instrument, use instrumental loops from programs such as Garage Band or Logic Pro. Create the music that you want to hear. Fuck everyone who doesn't like the music you write. Fuck everyone who says you do something the "wrong" way. There is no wrong way when you created it yourself. Play chords "wrong" or sing out of tune just to make those people angry. It's your music. You decide what's right.