Superday Advice Re: Shallow Stuff, Ladies Please Help!!

I have an IB superday coming up soon at a bulge bracket and had some questions about the way I'm planning to look. I know some of these questions might be stupid and I'm probably overthinking some things, but I really want this superday to go well and consequently, I want to get every last detail right. I really appreciate the help! Also, when copying and pasting the links please take out the (), had to put those in so this would post!

Hair: I have short (a little less than shoulder length), naturally straight hair. I prefer to go with a wavy, curly look (hairstylecamp(.)com/wp-content/uploads/5-29.jpg) because my face is on the rounder side, and I think beachy waves make me look a whole lot better. That being said, I'm not sure if that look is professional enough for a superday? What do you think?

Shoes: My feet are kind of wide, so I've never been able to make the usual pumps you see people wear (dsw.scene7(.)com/is/image/DSWShoes/384987_109_ss_01?$pdp-image$) look good. I have a pair of suede shoes with an ankle strap that look something like this (rockport(.)com/dw/image/v2/AAFJ_PRD/on/demandware.static/-/Sites-itemmaster_rockport/default/dwdf2c6d20/hi-res/CG7880_MAIN.PNG?sw=500%20500w) or this (di2ponv0v5otw.cloudfront(.)net/posts/2018/01/19/5a61f4778df4702423d5e626/m_5a61f619c9fcdfc9e5c13814.jpg). They're surprisingly comfortable and my go-to shoes for formals, but I'm not sure if they're interview appropriate? Again, any thoughts on this would be greatly appreciated!

Final touches: I plan on wearing a black skirt suit, and was wondering if I should be wearing nude pantyhose under? Not sure if that's something people still do or not.