In reply to AndyBC:
I don't like either of them. I don't like the flat light in the first one and don't like the conflicting style of the second.
I don't think you should listen to my opinions though. You don't need the majority of people to like it, you need a few people to really like it if they are going to buy it.
Why do you need to go full time? Just paint a few pictures in your spare time, set up a market stall or website and see if you sell any.
If you are selling enough so you don't have the time to do it in your spare time then throw in the job.