Kevin had some really good advice for you. like pretty much any endeavor you have to really work your butt off for years and years before you become an "overnight success"!

heck, John Lennon and crew wrote and played for almost 5 years before auditioning for Decca who turned them down! but they kept at it and we all know how that worked out!!
unfortunately there is no guarantee that all of that hard work will yield one thin dime! I know extremely talented singer-songwriters with professionally produced and critically well received CDs who work full-time non-music jobs to pay the bills.
if you are seriously interested in "making it" in the business I'd suggest that you review some of the competition you'll be facing so you'll know whether your current songs make the grade or if there are things you still need to work on. there are some decent songs in this forum but if you really want to be blown away check out some of the songs here
http://forums.taxi.com/forwards-f2.html?sid=143ec5b6b2241dc85793367487dee0f1many Taxi members are extremely professional and are heavily investing in their music. when I reviewed songs there I found lots of folks who write songs and then have them professionally performed, recorded, mixed and mastered before they even try to submit them to potential buyers. you cannot expect a busy record exec or TV producer to listen to your song for its potential when they are receiving chart-ready demos from many other people.
so, hard work, improvements where needed, more hard work, persistence, write, write, write, more hard work, network, submit your songs to places like Taxi, release your CD, play live and create a fanbase, more hard work. Rinse and repeat!

And who knows, you just might be the next big chart topper!