The only advice I would give Christians entering the world of arts: give yourself a period of time, maybe three or four years. If you haven't made it in your chosen art form, dump it.
I think that if you are going to be successful as a Christian in the arts, you have to be successful in your Christian life.
I don't mean that if you're a Christian, walking close to God, you will immediately gain celebrity. you may fail as an artist, because you may not have what the public want at that time, and you have to be prepared for that.