Starting a Routine

So I feel like I should have started a routine earlier than 3 months but I have been blessed to be home for 4 months after having my baby...so of course I'm now looking for advice in how to develop a routine. Baby girl will give us at least one good stretch of sleep at night usually between midnight and 4am and then will feed and sometimes has a hard time getting back to sleep right away, she'll usually fall asleep between 10-11pm which I know should be earlier. She doesn't like to nap in her crib just yet but I can get her to fall asleep after nursing and put in her bassinet for some naps throughout the day, but no specific schedule. I will be putting her in a daycare one day a week so I want to start a routine.. I'm hoping it's not too late 😔 Any tips or advice are greatly appreciated!!