Hi female,
I think honest has a point as in, with such a unique and attention-grabbing dress, need to make sure everything else presentable or else they will pounce on whatever's lacking. Human nature- how many times we see a lady with enviable figure and nice dress only to tear her face to shreds, yikes.
But it's your wedding- and your body looks good in it (won't have any comments of fat arms, or fat back, or flat chest, lucky you!), I'm sure as long as your face is "regular", with makeup, you'd look great

Agree abt how you carry yourself- if you are comfortable in it, can carry yourself well, if others eg. relatives or friends, who insist on criticising you on your Big Day, well, there's no pleasing everyone.
Cool you are making it a surprise for your HB- my gf did that too. I'm not so confident so I keep dragging my HB for gown fittings for reassurance, sigh.
Hmm, I thought it was grecian in style, but married's right the front does resemble Marilyn's white halter somewhat. I think you can do a glam updo- something with curls perhaps, tying in the more olden-period? Happy experimenting
I don't think it looks cheap, it's only 1st Fitting, when the pins are removed, your makeup and hair done with appropriate accessories- you'd get a classy whole.