Thanks for the feedback, everyone! I was in a pretty silly mood when I wrote this but I'm glad the analysis paralysis resonated with some of you. I do have a relatively serious anxiety disorder that has been a lifelong struggle. But to some extent it's also my strength -- a lot of the same analysis traits are useful in my career. At any rate, sticking to all black really does make my life easier, but I've always preferred guidelines to rules, and it's fun to try new things.
I agree with the suggestion that I should try a few other pinks. Watch this space for more photos!
I do like the Madewell shirt. I wore a lot of pastel oxford shirts to school as a kid (my mother often wore them too). I'll keep an eye out for something paler but in the same vein.
As for the sneakers, it's a frivolous purchase so I'm looking to keep the cost low, thus the focus on Converse. I might order a few options.
And the dress... I own far more than I wear, and I'm trying to be smarter about that. I have a vaguely similar McQueen sun dress that's a total closet orphan. But for $30, it's impossible to pass up, so I think I'll stop back by Crossroads today or tomorrow and snap it up. It looks more "me" in the photos than it did in person, somehow, and my partner loves it.