Black shoes would be fine. they aren't going to be looking at your feet.
Hair up or braided. Loose would be a bit too casual, I think.
If you're comfortable carrying just the one larger bag, do that.
Both outfits sound like they look very nice. Which one are you more comfortable in? They aren't making clothing assessments, they're making YOU assessments. If you're comfortable, I think you'll feel more confident instead of worrying about a tight waistband, too-long sleeves or other trifling details.
Good luck!