You couldn't act like a Parisian even if you tried. You're not very knowledgeable about their culture or tradition but you're okay with that! That just means you'll have to learn and experience everything they're about.
Not At All
While you may not know it at first glance, you do know some things regarding French culture and traditions. It's certainly an interesting culture to learn about.
You know your stuff when it comes to French culture. You don't know everything regarding it but you do know quite a bit. You have an interest in the traditions of the French.
If you're not French already, you can totally pass for a Parisian. You know all there is to know about French culture and it shows in the way you act and talk.