Submit Submit Submit.

Send your writing to journals, anthologies, and other publications, both on-line and in print. You will probably want to find a real job in the meantime - it might be something related, like copyediting, but you might need to just do something to pay the bills.

Stay focused, but remember - there are a lot of people writing out there, and depending on your level of skill, it might be very difficult to actually make a career out of writing - though you should never let that stop you from trying!!