Totally agree with Cabbage on everything but him talking about attacking the ball and being athletic when picking it up reminded me of something. What I teach my guys is to do everything he said is to put their nose over the ball. This will force the athletic stance and keep you from taking shortcuts by trying to reach for the ball. Something I tell all my fielders is quick - slow - quick which means quick to the ball - slow to field it - quick to get rid of it. Only way to do this is to be athletic and work on your feet.
Check out the video I just uploaded: https://youtu.be/Vuhg5M0bSQg