I think steps 3,4,5,6,7 are not needed! The essential problem in removing the keyboard is not shown: how to lift the keyboard! Use the flat side or back of a screwdriver to push the metal strips shown in step 8 up (in the direction of the keyboard) to lift the keyboard. Put your fingers under the edge of the keyboard and pull gently but firmly. There is some resistance of the holding cover.

See also: https://www.youtube.com/watch?v=nELBz1VB...