I work at Epic, so the resources I have are all internal training/document. That being said, the best way to learn it is probably to have someone who’s an expert in it, ideally another doctor, walk them through it. If you want, I can see if I can find some specific customer-facing documents/training to link them to.
Lack of public documentation has to be my #1 pain point with proprietary software over the years.
Especially in the EMR space, putting up barriers to access basic documentation is quite unreasonable.
Public documentation is not going to suddenly allow your competition to gain an advantage, while your own firm benefits from users being able to easily google and get authoritative answers from your own official documentation.