Don't fret too hard, you're no longer tied to that city upon level 15 and the Airship access storyline unlock. This takes less than a day to get to. You're able to change your class upon completing the level 10 guildmaster quest as well, so you can quickly get back to where you were. You keep all your old experience earned and all your loot... Perhaps you should have paid more attention though when you selected your starting point.