Not sure how much I can help but places to start usually means questions to answer
~ Examples of Orchids In History and Art?
~ How they became known as Orchids? (I'm sure you know the answer)
~ Why tug at so many heart strings across the world. Why the Mass appeal?
~ How come you can cross breed species so readily compared with other plants?
~ How many Varieties are there?
~ How do they breed in the wild?
~ Natural Selection? Certain Ophrys for example evolved to attract certain species of Bees (and insects) and not others. This in turn may mean their demise in the wild due to the decline in Bee populations.
Just a few starting points to think about.
and ask yourself, If I were completely New to Orchids what would be the questions I would ask and want to know?
Hope that helps a little. Hopefully some one else may pipe in.