At this stage, let mama deal with it. Just keep an eye out to make sure she knows how to be a good mama. As long as she is cuddling it, and feeding/cleaning it, things should be fine for the first while. I would just make sure mama has enough food and water to nurse.
As for names, personally I would wait, let the little one develop its personality a bit first. A name might just come to you as you watch it play. And waiting to see the sex might help in naming as well
Good luck, and congrats!