First dress/Commission

Just received my first lolita dress that I had commissioned by ki75un3 and I must say I really like it. I did a ton of research to try to make this really nice. I didn't put makeup on since I was just trying it on.
Shoes: Dansko Shoes from Zappo's (since I have really big feet)
Petticoat: Malco Modes #582
Hosiery: Angelique Inc on Amazon





Any ideas on how to make this outfit nicer since I'm going to Otakon with it?