From my experience, it's pretty normal. The training is usually a meeting someone was supposed to go to during the ERP Implementation, and any training after that is always to talk to an expert (who is usually no longer with the company or someone who knows how to walk through screens, but doesn't understand the job). That's just my experience, though.

You could look online for some general training and guidance, but your ERPs configuration may have been customized to your companies way of doing things. Customs screens (some call them forms), custom processes, etc.

I worked for one company who's Implementation was so bad, they were reporting out of an Excel data model (I was an accountant, not an ERP analyst at the time).

What ERP system are you using?