I'm fairly new to baking and cake decorating. My questions involve filling cupcake and storage. What suggestions are there for filling cupcakes? I have a recipe for the cake and filling but wonder the best way to get the filling in the baked cupcake. One suggestion I had was to use an apple corer. Also, how do I store cupcake? Do I need to bake them the same day and I'm going to serve them? How do I store them with filling in them? Room temperature? Fridge? Thanks for your...