Oh! NOOOO! Poor Yoda... Good luck with this! (dead serious- not trying to sound rude or cross or snarky) I've heard nothing good from those who watched Serenity first then Firefly. The movie gave them so many misconceptions about the TV show that they were lost.
Though- you LIKED it right? (my other 3 friends didn't- but I attributed that to watching the movie first.
See- if you hadn't seen the TV series:
Click here to see the hidden message (It might contain spoilers)
Book and Inara's characters would have been side stories to you vs main characters you were wondering about since the movie starts.
In the TV show they were both considered a part of Mal's crew on Serenity (the ship). But in the movie you'd not have that information. (You're expected to have seen the TV show first for the little details.)
I'll be very interested in your outlook on the TV series when you do get a chance to watch it.