I found a book (available at http://pages.ivillage.com/1619/medic...s/?hop=aedrich
which provides an introduction to the subject. It only costs $30 (for the ebook edition) and $40 for the printed copy.
Before investing in a course (which might be well worth it), folks interested in a field should see if there's a less expensive introduction, such as this. The book has a 60 day guarantee.
(I have no financial interest in the company selling the book, and don't know anything about it, except from what's on their site).
I've found a good way to snake out difficulties with a particular field or issue is to go to google, type in what you're trying to find information on, with the word "problem" after it. (To find the above, for example, I put in "medical coding home based problem" and found this book). Putting "problem" into a search weeds out those that are pure advertising.
Jim Huffman, RN