My advice: since you're admitting voluntarily (assuming you're in the US, idk if this is a distinction in other countries), do some research to try to find a hospital (or even better a crisis stabilization unit) that is voluntary only. You will be with people who are more tolerable to be around and treated with a lot more respect. (EDIT: Also call ahead to make sure they have beds, otherwise they might just send you somewhere that's mixed vol/invol.)
Some hospitals (usually just voluntary only ones) allow you to have your phone for parts of the day, so also worth looking up which ones do this.
Reddit sometimes has threads about the best mental hospitals in your area, so that's a good place to start.
Best of luck to you!