If you want to make a step-by-step sort of safety plans, there are lots of templates and whatnot online. Some are more formulaic than others. The general idea is to list out things that can work well for you in particular and keep that list in an easily-accessible area so you can refer to it in moments of distress. The average safety plan may ask you to list triggers, warning signs that things are getting worse, various coping strategies you can use without involving another person, places you can go to feel safer, loved ones you can reach out to for more support, ways you can make your environment safer, reasons to live or otherwise stay safe, professionals you can reach out for support, and ending with the suicide lifeline and contact info for nearby emergency rooms and hospitals in case your previous ideas don't work as intended.
If you have a therapist, you can also ask to make one together with them, and they wouldn't have sufficient reason to hospitalize you from that alone. Or you could try calling the national lifeline. They won't hospitalize you unless they believe you to be in immediate danger, and once when I called in the past, the man on the other end walked me through writing up a safety plan.
Regarding hospitalization - yes, it absolutely sucks, but most of the time it's at least bearable, and some people do find it helpful in the long term. My understanding is it helps most for people who are acutely suicidal rather than chronically suicidal, and one pro is that they generally help with medications and getting you connected with intensive aftercare.
I hope at least
something in there was helpful, and that you can come up with something that works well for you