"...my advice from having been right where you are is this:
1.paint something even if its small (6x8) every single day.
2. market yourself somehow every single day. start a blog and post your one or more painting(s) there. that post counts as your one thing. if you dont post something call someone about showing your art at their place. restaurants, places of business love having art hanging that doesnt cost them anything. have tags next to the stuff for people to get up with you about buying it. you have to do something like this every single day.
3. make a goal of getting in an arts council show (or a multiple person show with other start up artists) anywhere that'll have you. exposure is the name of the game.
4. keep some kind of other sure thing job until youre making enough off your art (consistently) to quit it. nothing wrong with working part time at two things. one you love and know will be fulltime if you stay with it, and the other youre just doing for money. actors and actresses do it all the time right?
these are the very first things i'd do. its how i started three years ago and now i'm fulltime.
if you do these things first you'll be living your dream! good luck and trust God for it!! "
i cant stress the last four words in the above paragraph enough!