So I've played a lot of mmo's and I played wow for roughly 4-5 years and no longer find it enjoyable, so I came to FFXIV. Now this job system is a bit confusing to me as at this point I've read so many different things about it I'm not sure what to believe, so to put it simply I've got a few basic questions but any more information on it would be welcome.
1. I've just reached 30 on Thaumaturge, to become a black mage do I need a level 15 archer or arcanist? or both?
2. Are there any other restrictions to becoming a Black mage?
3. Does my secondary class get an exp increase when it is a lower level than my main one?
4. Can you switch between those classes freely once you've become a black mage?
Thank you for any answers in advance.