How do I quit my corps and join a new one?

Click Corps, lower left hand corner of the screen, then manage, then quit.

Under corp, manage, quit.

Under the trophy lists rankings, look for a commanders/corp under here and apply.

I’m not sure where it is been searching online for hours and starting to lose my cool over it :( non of what’s been said is showing up on my game. Is there another way to leave corps ??