Here's a recipe I found. It sounds pretty basic and easy. It's perfect for rolling into balls. I guess the marshmallow creme is the key for whipped cream centers. I haven't investigated this site quite thoroughly. Hopefully, you'll be able to find some more whipped creamed recipes for chocolate centers.
I've never tried that. I may have to try since my wife loves chocolate anything. I made her a home-made Reese's cup for Valentine's Day and she loved it. I'll have to try that recipe for her Mother's Day gift. Any time I can give her chocolate, I'm ahead of the game.