Well, here's a good place to do it- check out Royal House of Fashion, the Royal Style File (I particularly recommend the "Best Gowns worn by Royals" thread), and the Royal Jewels.
You don't have to know a lot about royals, but just an interest (and hopefully), a willingness to post!). I didn't know that much about royals before joining TRF, but there is always someone who knows a little something, and when you add up all our members, that adds up to a lot!
Just have fun, read, and post!
The only limit to our realization of tomorrow will be our doubts of today. Franklin Delano Roosevelt