SE have CLEARLY said that you will need to finish the MSQ to get to Ishgard, and that you will need access to Ishgard to get any of the new jobs.

You bought the expansion despite being able to know this, so it's your own fault.

I would suggest you wait for the release, and the do the story, it should give you a crapload of levels, due to the new exp it will give, so you should easily be able to grind your way to Ishgard within a day or two. ANYONE can deal with a day or two of "boring" grind if they have a clear goal. Especially with the non-existent Tank wait time for dungeons...