I worked in the Medical Records field for a few months until I was moved to a different department. I think that if you generally enjoy office jobs then you will probably enjoy this. You need to learn medical coding (most likely) for medical conditions, basic filing, patient rights. There is a part of our Medical Records system called OASIS where patients' change of status is continuosly submitted online to the state for billing purposes (and others that I'm not totally aware of). I did this for several weeks while covering for a coworker. IT is not DIFFICULT, it just requires a lot of attention to detail. Nurses and doctors are generally very sloppy and they hate doing their paperwork, so it requires a lot of care and attention on your part. You may be required to take a few classes, though you can find that information at your local university/college or online. Even though I'm very sure you can learn everything you need to know on the job, it may give you an advantage to take a couple of semester courses first. I hope this helps. It's really not a bad field to be in. You get to learn quite a bit of medical without actually being in the field.
Sara