If I were to pick a starting point to get on a more structured routine, it would be the morning wake up. If 9 am is where you want to start, then you can expect a 9-10 pm bedtime. However, I don't know that as your dd gets older she will continue to sleep in until 9 am. Most babies, and just most not all, are wired to wake more around 7 am, give or take an hour. It depends on what you and your family are more comfortable with. Then, from wake up time, I would expect she would need her first nap 1.5-1.75 hrs later. Hopefully, getting back to a 4 hr routine will help with the 45 min naps, as well as more consistent night time sleep and wake time. Let me know if this helps.