How to turn off screensaver automatically when "do not disturb“ is on?
If you're using the mouse &amp;/or keyboard, it won't, of course, go to screensaver.

If you're not, try System Prefs > Desktop &amp; Screen Saver > Hot Corners.

I have mine set like this... just shove the cursor to the top left of the main screen &amp; no more nodding off...