Do you actually have any water or coolant in your reserve tank? I'd be surprised. If you do, and you want to get it out you have two options. #1: Syphon it out with a thin tube or #2: Disconnect it and drain it manually. What you've Googled is 100% correct. There is no drain plug in the system so the best way to drain your system is to disconnect the hoses from the back of the radiator and let it flow out. Hope you enjoy that /84.
So live your life that the fear of death can never enter your heart. Prepare a noble death song for the day when you go over the great divide.
Sing your death song and die like a hero going home.