Windows 8 is crap tbh. Trust me I'm a engineer.
The only way I know to get to the off switch is through alt ctrl del. Is that right? In previous windows that was for emergencies!
Yeh. I suppose I could just push its off button but I never thought you were supposed to do that.
On the start screen in the upper right hand click the on/off/sleep button.
That. Or hit ctrl-F4 while on the desktop.
You can change what happens when you press the power button:https://www.eightforums.com/tutorials/14956-power-button-action-change-windows-8-a.html