The card flip is not really a hard to figure out.
Someday back they even added all the pointers where the girls give you reaction depending if its something good under the card or not.
I am not sure (didnt check yet) but there used to be even an option to "view" all the cards so you can choose which to flip.

Personally though > this is one of the events where I tend to crack my Stamina Pot stock and just grind like crazy, so I can full clear all the pages. No better time than these grind fest events to use these if you ask me. Tons of goodies that when fully claimed will be nice addition for a seasoned player and can carry a new player for a while.