Need some help on job change

[TaRgEt14]

Hi guys.. i am new to this game and i still haven figure out how the job change of this game works.. i believe i wanna be a mage.. but what is the lvl that i do so? and who do i find?

And also.. do i have to follow the quest of the game tightly? as in complete every one of it? or do most of u guys simply just train and lvl?

[Anmbia]

Talk to the girl on the north east side of the tree in brynhild. You have to be lvl 16 to change.

You don't have to do every single quest in the game, but some of them are linked so that you have to do the first quest to open the second. I think the ones in the mines are like that.