Funny, I was just thinking about this today on my way home from school--A nice diversion from organic chemistry! I am far from a good name though...
I like Wanna B. It does suit, you are young-ish and it is humble--a still-learning name. Plus, when you are older it will still be humble. Shara, the eventual rabbit expert, with a humble name, makes you even more appealing and approachable, you know?
We could all stand to be more humble in this life.
And since it doesn't matter until you start registering rabbits, really, you can always change it...Like Maggie says, test drive it!
Just don't start test driving names during a pop quiz.