I thought i had to push the ~ or ` key to open the console but my PC simply ignores the command. Can anyone advise?
You have to go to the Game settings and check the
enable developer console. After this you can use ` or the assigned key to open and close it.
Start game -> Help & Options -> Game Settings -> make sure you have this enabled(There is an image in the source link for the page you are looking for)
Then You can go to Help & Options -> Keyboard/mouse -> and change your console key. The default is " ` "(Tilde Key).
Hopefully this helps.