Best training courses for criminal law for new hires?

I work at a law firm and assist with training new hires. I find it easy to train them in company processes, but I struggle with explaining to people, especially overseas, the core basics of the criminal justice system, what a crime is, etc.

I have a criminal justice bachelors degree and I used to be a police officer, so my understanding of the system is a little bit ahead of the average beginner legal assistant.

I’m not asking to have an attorney by any means by the time Im done training them, but I want them to understand things like what a capias is, and the seriousness of a felony vs misdemeanor, etc. our training timeline works in the fact that we really only have time to train in company expectations, sales tactics, and our software/law firm owners expectations, so I cannot spend weeks teaching them things about the system. I would just like the course that’s a week or so long that I can propose to the law firm owner.

If something like this exists, I’d love to see if something like this exists for immigration as well.