White Mage is the first healer you can play in Final Fantasy XIV and one of the most straightfoward as it focus on keeping everybody healthy.
To unlock White Mage players will simply need have either started as a conjurer when they created their character or go to Gridania to unlock the quest. Conjurer is the first part of White Mage and will only last until lvl 30 where you'll upgrade to White Mage. The quest to become a conjurer is given by the Conjurer's Guild in Old Gridania (X: 6 Y: 10).
Upgrading from Conjurer to White Mage will be done by taking the quest from by E-Sumi-Yan in Central Shroud (X:6 Y: 10.6), this will start your White Mage quest line.
The White Mage questline features 19 quests. During these 19 quests eleven of them will unlock new spells so make sure to do them all if you plan on using the job!
The last quest of the series is a yellow quest so you might miss it if you don’t pay attention.
FFXIV White Mage Quest List
Once you finished the job quests you will also be able to take on your role quests. These quests are shared between all the classes from a same role so you'll only need to finish it with a single job.