just remember, they move to institutionalize you if you have a concrete plan to kill yourself and it seems you are serious about acting on it - I’ve talked to therapists about my suicidal ideation and was clear with them about times I had developed concrete plans and was getting rid of my belongings vs just ideation that doesn’t translate to any clear plan or action

there might be other ways to get institutionalized, but having an active plan to kill yourself is the main one I know of