I've been meaning to post this, but hadn't quite gotten around to it. But if anyone else would like to delve into what precisely was in style at start-of-game, or what accessories or trends might make our characters slightly scandalous, here's a venue to do so!
I'm including some links I've found helpful in reacquainting myself with Regency fashion:
This really delves into specific years and the effects of the blockade between France and England during the War: https://www.fashion-era.com/regency_fashion.htm
This is very good for basic terminology but isn't quite clear on the French/English distinctionL https://www.kristenkoster.com/a-primer-on-regency-era-womens-fashion/
And here's an interesting article about dress and Austen: https://lithub.com/tight-breeches-and-loose-gowns-going-deep-on-the-fashion-of-jane-austen/
Military details and styling were are also very popular.