Here is the basic version of the setup you’ll have to do if you have an Nvidia card, and if these sentences are confusing you might want to hold off on giving this a try: Getting the mod up and running is a snap, as long as you’re comfortable fiddling with your graphical settings in general.
A player-created mod for the PC version of Sekiro: Shadows Die Twice adds an impressive variety of graphical options to the game, and even includes settings that allow you to craft your own version of an “easy mode.”