I suggest hiring on with two different agencies. I originally gained psych experience this way.
It depends on the facility the agency is trying to staff. Some facilities will make you jump through more hoops than the staff.
It would be a good idea to study up on psych and as by Nurse suggests, obtain training in assaultive behavior ( try also CPI).
If needing to learn about how to handle an assaultive patient doesn't scare you away that is
I assure you, it happens and it hurts.
As far as L&D, sorry . Don't know nothin' about birthin' no babies. But I would imagine the would be one of the most highly regulated specialties.
Good luck, keep us posted.