If they look good right out of the camera, then there's no need to edit them. My hunch is that in a year, you'll look back on them and think, "Hmm, at the time I thought these were so much better...what happened?" As you gain experience, your skill at evaluating a photo will also improve, you'll be able to differentiate a "pretty good" photo from a "great" photo. And, your shooting style and editing style will grow to include these skills and insights.
For now, there's no sense in editing just for the sake of editing.
As stated above, if you can get it right in the camera, then use jpeg. However, shooting in raw will give you MUCH more flexibility and latitude to make changes and corrections later - just in case you're in a difficult shooting situation or if you just plain mess up.
As mentioned above, Lightroom is a fantastic tool - it's half photo editor and half database/organizer.