Going to be honest here
If I were suicidal enough and I actually had guns and didn't care, I would shoot up my school
I'd do it gta style too where I shoot some dudes, get out into a car / my car, drive away in a police chase and shoot at the cops. The finishing thing that I'd do to kill myself would be crashing head-on into a gas station or some massively populated walmart at like 60+ mph
If I survive then, I would shoot myself bb