I think I would go with the second pair of nude shoes as the heel is smaller and more consistent, and I like the sparkle , I don’t know if it is clear on the picture but it is a taupe and silver sparkle. I would probably try to find a clutch that fits with that theme
Do you think I could wear tiny diamond and sapphire pendants close to the neck? Diamond .07 rose gold, sapphire .1 rg (not bought yet, though not only for this purpose). I was thinking discrète for the earrings, maybe diamond studs or huggies (maybe the studs would be too understated though), or small pendant diamond (this last one would probably be my first choice)