On many keyboard there's only one Ctrl key and it's at the left and hence it makes Emacs's "C-x" really painful. You're supposed to hit 'x' on a QWERTY keyboar

On many keyboard there's only one Ctrl key and it's at the left and hence it makes Emacs's "C-x" really painful. You're supposed to hit 'x' on a QWERTY keyboard with your ring finger. One trick, not mentioned in the linked doc, is to move C-x to something else using Emacs' very special "ctl-x-map". Check one of the mapping using "Ctrl + one finger of the right hand" which is a functionality you don't use much and map that to ctl-x-map.