If you have minimal security expertise, then you're supposed to be treated as noncompliant. There are two valid options: have the security expertise (and be prepared to legally vouch for it that you have, and get insurance for cases if it turns out that your expertise wan't enough), or get the security expertise from someone else. Oh, and the third option is to stop handling any sensitive data at all if you aren't equipped to handle it.
The reason why HIPAA (and similar compliance issues in other domains) exist is to try to eliminate what you're proposing. Random companies with minimal security expertise shouldn't be handling such data themselves, period.