i stayed 3 months in a psychiatric unit and the best advice i have is to go voluntarily and take all they have to offer. don't fight back against the staff or harm yourself because then they will keep you in longer.

it's okay. they do keep you safe, but it's excruciatingly boring, most of the time all we did was watch TV. the other patients could be very triggering and annoying as well. but if you feel you need it, go for it.