you know, I never did way what program. I am using Blender. Thinks it was around 2005 or 2006, I first learned about it and started working on some model but I stopped after making a few. I started following the mesh project in SL and now am "relearning". I just love the new interface for blender.
Perhaps starting with learning to make good model, without worrying about poly count is way to go. Then later, start to develop a sense or "eye" for how to make them low poly.
But gawd yes, modeling is just aspect huh. That's all I learned in my first experience with Blender, now it's textures and is very challenging.