I think I do understand what I am supposed to do – but my admin panel doesn’t look like the ones on the pictures you are sending me.
This is what it looks like for me:
So as you see, I cannot do what says here: https://www.dropbox.com/s/097zodsso1r8n9l/Screenshot%202017-11-23%2008.55.11.png?dl=0
(I cannot choose Classic mode, and so on.)
What could be missing?