Well done for stopping biting ur nails first of all! I dont know how cuticle remover cream works but to push them back either---1. Soak your hands in warm water and use an orange stick (little wooden stick, not actually orange, available from Body Shop, Boots etc) to gently push them back. Or
2. Use cuticle softening cream and do the same thing.
They will grow back but they don't (as far as I know) have a purpose, if you let them grow they'll probably end up looking neat on their own but if you want to paint your nails a colour as opposed to just clear they tend to get the polish on and make it look a bit messy. Vaseline do a good hand cream. Hope I've been helpful!