Hey! I volunteered with a crisis line for a few hours a week for about a year and a half. Work full time at a group home for almost a year now. Was involved in a few clubs at school (one research one and one mental health one). Some part time experience in health care / admin during my undergrad. A little bit of experience as an instructional assistant at school (one semester). And about 2 years of experience researching in psychology labs at my school (including doing an honours thesis). Not sure which experience is relevant to them though.
I hope you hear back from them!!