LOL, approprio.
First, I have to say that I love American Duchess shoes. Aren't they gorgeous? I've got my own small collection, though I haven't gotten Pomps yet. I do have these and love them:
http://www.american-duchess.co.....shoe-black
The smaller heel looks a little funny to modern eyes, but it's excellent for 1770s and 1780s, and you'll be seeing it at Colonial Williamsburg. I've been the owner several times and she's awesome, too. Yay for supporting small businesses!
I'm having a little bit of difficulty figuring out exactly what you mean. "Baroque" is a really broad term, and a quick Pinterest search showed at least two variations.
Neo Baroque - 18th century, Marie Antoinette, stays/bodices and tall hair, skirts long or short (panniers or not), cupcake colors, flowers and lace. Example pinboards:
https://www.pinterest.com/wildcharmz/neo-baroque/
https://www.pinterest.com/lani.....y-couture/
Or, Italian-style Baroque - more 17th century, less historical in outline, rich jewel tones, brocades, lots of gold embroidery and jewels. Example pinboards:
https://www.pinterest.com/axo5/baroque/
https://www.pinterest.com/lumu.....on-styles/
Both are very elaborate, maximal looks. I think you're going more for the latter, based on the choice of black Pomps and the inspiration pictures, but toned down (less gold and jewels). Is that right?
Regardless, I agree that DIY is the best way to go. (At least when you don't have a Caroline Herrera budget!) Thrifting and vintage is a really good
start. There's a lot of romantic-ish Gothic-ish stuff around from the
80s and 90s, and longer drapey flowy things from the 70s. All of those
are good bases. If you're going for the rich colors, the 80s and 90s saw lots of beading and sequins. These sorts of items can be (CAREFULLY) cut down and modified. (Never cut a bead thread or they'll all come off!)
But the most important thing to do first is to decide what YOUR interpretation will be. I highly recommend setting up your own pinboard, or otherwise collect inspiration, of exactly what you're looking for. Choose pictures that exemplify the look you want. If it's only a certain element of the picture that you like (color combination, shape of a jacket, neckline shape, etc) make a note of that. When you've got a lot of inspiration, analyze what it is you like. Make a list if you want. The goal is to know what you want before you shop. Then when you sort through the racks of the thrift store, you can identify what will work.
And really, have fun with it! This is a very individual look. It can help to have a particular icon or image to guide at the beginning, but it's really about what you want.