No training situation

Been in a new job for a few months now and I won’t go into too much specific detail, but I’m looking at issues revolving around something I have no experience in within my field.

No real training just some knowledge base articles to review and I feel like I am in the deep end of the Shark Tank after an issue arose, and I am trying to deal with it.

When I was interviewing, I made it crystal clear that I do not have any experience in that particular area. No one seemed concerned.

It’s not that I can’t learn it. It’s just that learning it on my own is extremely painful. And this area is relatively critical to the company billing and getting paid.

Just asking for some advice or thoughts on the situation.

Thanks 🙏