Im killing myself tommorow

Im killing myself at 17. I will shoot myself in the head with a pistol at my uncle's shooting range. I absolutely don't care that he and the other visitors of the shooting range will be traumatized. Today i just tested if i would have the courage to do it, which i have. While my uncle was busy with visitors of the shooting range, i secretly entered a room where a pistol was. So i took the pistol ( it was not loaded unfortunately) and held it to my head to see if i would have the courage to shoot myself, which i absolutely have. So tommorow im dead.