It is very important for us as parents to teach our children independence and self-reliance as early as possible. It is not only good for the child's personality, building their life skills and self-esteem, but it is also good for the parents as well.
We can see how Islam encourages us to categorise the different stages of growth a child goes through, and to cater to each stage in its correct way.
If your child does not have any physical difficulties that would impede her from doing these things on her own, it is highly encouraged from now to start teaching her these things so she can do them on her own.
The more you delay it, the more difficult it will be for her to learn. Start with toilet training, getting her to learn how to clean herself, on her own. Then gradually give her the confidence that she can shower by herself, and so on.
As for sleeping, I am sure you know how important it is for each child to sleep separately, on their own. Try to read about this topic from the viewpoint expert child psychologists.
With prayers for your success.