yeah, it definitely varies from person to person. i've been 2 different psych wards, my first experience was pretty wonderful, my second and hopefully last experience was very traumatising.
things they do is take your vitals in the morning, line you up for meds (that you're not even prescribed, just meds based on what they think will help you.) there's usually mandatory group sessions/activities. refusing to go just makes them try to keep you longer because you're not progressing if you refuse "help". they let you outside for fresh air, heavily monitored. you're allowed to smoke in those instances. sometimes they'll let you have a journal to write or draw.
my first stay really did help me. i met some amazing people that had incredible stories to tell. i've thought about them everyday since then (over a decade ago by this point. who knows if any of them are still alive since we were all there for failing to ctb/drug abuse). it was a good 2 weeks. one of the nurses put my preferred name on a pencil and saved it for me to use since i only ever wandered the halls and drew in my journal. we weren't allowed to take pencils or anything we could kill ourselves with to our rooms. it was that reason that i just wandered around. i didn't wanna break the rules.
my second experience was the complete opposite, so much of a downgrade, i didn't care about breaking rules. i think i've gone over my experiences in a different thread, i don't remember. it was awful.
either way, experiences may vary. until things like white rooms/quiet rooms are abolished, i will never fully trust these places as anything other than providing a different form of psychological torture than if you just sat in your room in the dark and self-harmed all day.