A word of encouragement here: Yes, it can be done. But it takes a lot of hard work and commitment.
I received a contract for my first book in 2007 after winning a contest and obtaining an agent. Fudge-Laced Felonies and the other three books in the series are now released as ebooks and still my best sellers.
After their publication, I kept busy with other writing, some traditional contracts and others independently published ebooks. It's the ebooks that garner my monthly income, which allowed me to quit the day job, after nine years, in May. But...I must tell you, I wrote while at work, I wrote in the evenings, and I wrote on the weekends. I wrote whenever I had a spare minute.
If you're called to the writing world, then you can make it. You might not be rich like J.K. Rowling, but you can, quite possibly, make a living. It takes hard work, dedication, perseverance, and God's grace. Good luck with your writing.
My latest book, Cooking Up Love, has just released through Harlequin's Heartsong Presents line. Happy Reading. This is the first in a four-book series.