Correct. However, you can start changing class at level 10.
If you really want to be Gridanian: Just get level 10 Conjurer, fly on airship to Limsa, and unlock the Arcanist class from the guild when you get the opportunity. If they still keep the same requirements from 1.0, you'll still be able to ride the airship from level 1.
Edited, Jun 13th 2013 5:00pm by UltKnightGrover
Thank you for the response :) Sounds like a plan. For the brief duration I played 1.0 I was a conjurer from Gridania, so I guess i'll do that again until I can make my way over to Limsa for my actual desired class.