300ping in instances

Just wondering if there is a way I can play without 300 ping whenever I join instanced content like pvp/dungeons/raids I’m a fairly noob player but I expected when I joined an oceanic server to only play with people from Oceana and have a normal ping it just makes the game feel unresponsive and clunky. Outside of instances I have normal 32 ping, I found out worlds are shared or connected or something to NA but how am I supposed to know which ones are shared or are they all shared? . I opened a ticket to ask for help but I just got some copy paste BS about resetting my router and trouble shooting so any advice would be appreciated because I really want to enjoy this game,Thankyou