Welcome! She is adorable! When my puppy was that age I would take her out whenever she whinned at night. I just made sure I kept it very brief and boring. I would turn on a little nightlight, carry her outside to her potty spot, and then carry her right back to her crate. It was not too long before she could go all night. I would personally not put her on some kind of overnight schedule, I would take her out whenever she wakes up needing to go. The biting and mouthing is very normal. If you search puppy biting on here you will find a lot of useful information.