I find working in any area I've had direct experience of triggering :/ I'm a mental health worker but avoid eating disorders, severe anxiety and personality disorders as much as possible- I usually work in psychosis. Be really careful with it if you give it a try, and make sure there's someone there you trust and can talk to. I tried to volunteer for a helpline but didn't make it through the training because the woman said I was "too anxious" which I think was her way of saying she didn't think I'd cope with it, so the training might let you know if you could deal with it. Good luck either way!