One other lens to consider for those who are just trying things out are the Symmar convertables. You get two focal lengths in one. Look for the dual f-stop ranges printed on the shutters and do have the speeds of the shutter checked out or you'll never know what your real exposures are.
I break photogrpahy into two types: indoor and outdoor. If indoor you'll need shorter length lenses. Outside calls for "normal" lenses, but really the choice depends more on how you see the world. That is up to you to determine. Don't worry too much about making the best first choice, best guess and go. Running with that feeling that leads to the guess is as good a guide as you will ever know.
Cheers,
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