I don't think they've given specifics, but I'm assuming all the Heavensward content (including Au Ra) will be available during early access. That's just an assumption, though.
Kind of off topic, but I can completely understand that frustration, because I spent a lot of time playing with the character creator (and my veteran reward Fantasia) to get get my avatar looking like she does. Miqo'te, Lalafell, and female Midlanders were too cutesy or overtly beautiful / sexy for my aim, female Roegadyn too buff, and female Elezen are just kind of noodly and weird if you ask me. So I tinkered with female Highlanders until I got a relatively realistically beautiful avatar who still looks like she can kick your ass. I can probably get the same results with an Au Ra, though I'll need to wait until June to try and do so (no PS4 benchmark makes me a saaaaaaaaad panda....).
Even more off topic, it's helped me to understand why women don't like being hit on.