I'm in the US, so I know it's gonna vary depending on where I'd do it cause mental health care is a joke here lol. Even so, how was your personal experience? Do you feel like it helped you?
Ah yes it's very different over there - hopefully you might be able to find some posts here or elsewhere on the internet that can give you an idea of your options, I know it'll depend a lot on insurance and that kind of thing.
My personal experience was bad, and I ended up leaving before I really wanted/needed to because the environment was so bad for me and was actively making me worse - combination of not enough staff, not enough for us to do, the risk rules meaning that I couldn't have stuff like my knitting to keep me occupied, some staff were awful (but some staff were really great). I found it very, very hard, and most of my energy in the months since has been put into trying to stay out of hospital - but in the uk it seems less often that someone goes in as a voluntary patient compared to being in on a section. From short conversations on here, people in the US seemed shocked that people in the UK usually have their phones when in hospital, idk if it's a rare thing over there.
Things like earplugs, an eye mask for sleeping, short charging cables (long ones had to stay with staff), comfortable clothes, some shoes without laces, noise cancelling headphones, a tablet/ipad/something to watch tv on - these things saved me while I was in there.