Sounds like a great idea. I always find it's easier to write short stories than long ones. Maybe my attention span only lasts so long or it feels so daunting.
Any ideas on the first topic? Off the top of my head:
Meet cute with D&E
Miss Bingley gets her comeuppance before the double wedding
Jane sees through Miss Bingley's note after the Netherfield Ball
It is a truth universally acknowledged that a single woman in possession of a good fortune, must be in want of a husband.
Why Lydia doesn't go to Brighton
Who got rid Wickham and why
Georgiana attends the Meryton Assembly but can only dance with Darcy and Bingley