The Ball or the Carpet? I have a Ball that is just a demon and snaps at everything. I have also seen Carpets that have never been bitey their entire lives. It just depends on the personality. No matter what you get you'll learn their personality and plan according to their mood. I'd say get a Carpet. They aren't hard to manage and you'll learn as you go.
Now if we were talking something that were to get larger like a retic or burm. I would try to steer you away as a beginner because the fact that when they are full grown it is not recommended to handle when you are alone. An accident with one of them could turn bad very fast. Over time you'll find your limitations. I would like a Retic but knowing that my wife isn't going to be much help in handling one I will have to wait.

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