Ciao, you need to unlock pvp first of all, so at lv30 when you unlocked a job, you unlock pvp modes by going into your grand company base where you will see a quest with a "plus" (+) on it and accept it, it should be a lv30 quest and it will send you to wolves den pier, then you may need to come back (im not sute though) to accept another quest in the same place for frontlines. As for rival wings, on patch fay you will see on the patch notes how to unlock it. So just wait until the full notes of patch 4.1