Help Me Change My Life

Here's the part where I seek advice from the blogosphere.

This is one of my favourite parts of blogging, because there are so many experts with such varied life experience that I'm betting if I throw a question out there I'm likely to get an answer.

I work from home now as a freelance copywriter and graphic designer. It has its ups and downs. For the past 3 years I've been toying with the idea of doing medical coding. I like medicine, I'm used to it from a consumer's standpoint, and coding is something I can continue to do from home.

I figured with all of you out there someone might be able to give me some advice or direction.

Have you done this job? Is it a good job? Did you like it? What type of training is best for me to receive?