HIPAA for CNAs?

I just got my CNA license and am now working for an agency. Does anyone have any recommendations as to an affordable online HIPAA class?

I have NO HIPAA training and I'm totally paranoid about accidentally saying something I shouldn't. I understand the general concepts behind HIPAA, but I need more specific information. With this nursing agency - I am an independent contractor working for the client.

I know that I am not to reveal any information about the patients' medical condition - or their names - to anyone other than a nurse or doctor who is directly responsible for their care - although in my case, I'm not working under the direction of a nurse or doctor, so that's a moot point at the moment. I assume if I had to call 911 I could tell them all pertinent information? (i.e., I have a wheelchair bound patient who just lost consciousness, and they have such-and-such medical conditions, allergies, they're taking whatever medication, etc.)

What do I do with the information about clients that the agency emails to me when they assign me a new client? Erase it from my email inbox once I get the patient's name and address? What do I do when my friends ask me what kind of patients I'm working with? (Can I say, I'm taking care of a wheelchair bound patient, if I don't reveal their name or any more details? And no, at the moment I'm not taking care of a wheelchair bound patient - just throwing it out there as an example.)

Anyway - I'd love a recommendation for an online HIPAA class, or a book, that clarifies what I can and can not say, and to whom.