I think it'll be super cute! I went from long to short 2 years ago and still love it. My hairdresser was talking about all the fun things you can do with short hair just last night, he was saying his least favourite cuts are below the shoulder because there's not that much you can do except layer. (Love Christina Applegate btw!)
__________________
“Ginger Rogers did everything Fred Astaire did. She just did it backwards and in high heels.” Ann W. Richards
That cut will look great on you! I wouldn't be nervous since if you don't like it (which I highly doubt!) it wouldn't take that long to grow back out since it's not that short.
Thank you thank you :) Its fun and easy to style (today I spent 3 mins on my hair). I've only had it for a few days so I'm looking forward to trying different methods and styling.. (curls, straightener, etc).