If you are concerned about your job, I suggest you keep your head down, stay under the radar, do as you're told and don't make waves. Yes, it sucks to be told that but the reality is that there is age discrimination going on every day, everywhere. It's often very subtle and difficult to prove, and you certainly don't want to try to prove it when you are unemployed.
They may already be setting you up for termination so be careful about saying things like "I can't do this" or "I can't do that."
You might be wise to take some online courses and pay for them yourself.
If you are concerned about your license, go to the licensing board's website and look up information about disciplinary action.
If you are concerned about lawsuits, I think you can safely rely on the hospital's liability insurance to cover you for negligent acts.