I would start with some general education supporting your field like Biology and Science. You can likely get started with an AA degree through your local community college. You might consider volunteering at a local hospital to get a feel for the environment. This is also a good resume builder.
I'm not a P.A. but sister started this way to become a dental assistant.
John recommends the following next steps:
- Check out certificate programs at your local community college
- Inquire at a local hospital or medical clinic about volunteer opportunities.