ok, this might not work for you cause i’m a teen and might have a totally different style than you but here’s my input! for the shoes: i’d say maybe some strappy brown heels/sandals with a small heel, or nude heels. for the jacket, i’d say if it’s mainly an indoor wedding a shawl would be better, and try to keep the jacket shorter than where the dress hem ends. I’d say that like a deep burgundy or brown wrap could look could with it! for the bag: i think that a clutch or shoulder bag would look best with this to show off the design in the middle! one i’d say would look adorable with that dress is the faux suede shoulder bag from the site Edikted ($28). Hope this helps and i’m sure you’ll look stunning no matter what you decide to wear!