first things first install the blizz authenticator app on your phone, after you have followed all the steps go to play ow2 and accept the security and done.
do note that American servers don’t seem to be 100% there so switch your server region to Europe or Asia instead.
Maybe if the so called “security methods” actually worked, normal players wouldn’t be so keen on bypassing them, not trying to be rude, just saying your protection kinda doesn’t work for the methods you say they’re for.