Uhm. Well, yes. I started blogging almost 4 years back and now I'm a National Bestselling author of the novel, The Other Side of the Bed. (You can google it :) ) Also I'm a contributing author to one of the anthologies. My next novel is due next year and yes, I even published a collection of poetry at Amazon Kindle.
Getting your blogposts publishes would be very tough - until and unless they are short stories (which again is not accepted by every publisher). I would rather suggeest you to develop a strong plot, or firstly strong characters. Writing a novel is a tough job - it requires patience. But I'm sure you will get through it!
But before you start, I would like to add that writing a novel is just 25% of the entire work, the harder part comes after that - making proposals, query letters, finding a right publisher, organizing a book launch and ramdom book giveaways. The process never stops. Nevertheless, it is all worth the pain. When a 50 year old man comes to you and says "You have changed my life" or when you recieve an email from a stranger naratting their entire lifestory and how because of your work they didn't give up. That makes it all worth it :)
Best wishes! If you need any help, you can let me know 