So i want to do diet on Facebook, my AM told me that direct linking does not work. So will linking to an advertorial work? Also is it necessary to use a cloaker to do diet on Facebook?
Yes and yes.
Check it out: https://www.makemassive.com/affiliate-lander/
Wouldn't advise running this kind of traffic via your personal account if you're so new to the game.
These type of ads will burn through accounts fast unless you know what you're doing.