I agree with Susan and Mr. Ploppy that you're likely to need stronger literary skills if you want to snare the attention of a major publisher.
Most large publishers, Random House included, do not accept unsolicited novel manuscripts. You will need to either acquire a literary agent or snare the interest of a Random House editor in order to get your manuscript considered. (Victoria Strauss has some excellent advice on
The Safest Way to Search for an Agent.)
The good news is that writing, like any other skill, can be learned and perfected through diligent effort. Most authors I know spent about ten years polishing their craft before selling their first novel. I'd encourage anyone interested in traditional publishing to seek out an online critique group and browse through the useful writing posts at RWA, SFWA.org and elsewhere.