Bluedenim, I'm not sure how big the plug on that one is but you better start with something small if you want to try and don't forget the lube… though if your planning on having it inside for a while you can't use as much lube because it'll make it slip out.
I would suggest experimenting on your own and at your own pace, starting off by making sure your squeaky clean there (this makes things far more pleasant in many ways) and then try with fingers.
Anyway, don't rush things, take your time and if it hurts your doing it wrong and should try to use more lube or a smaller size.