Hello girls. Mommies, could you please tell me when babies establish a…

Hello girls. Mommies, could you please tell me when babies establish a sleep routine? We still don't have any regime ??‍♀️? Sometimes it sleeps normally until morning, after night feedings immediately falls asleep, sometimes wakes up for night feedings and can't fall asleep again, asks for cuddles and outside, and therefore sleeps all day, and then doesn't sleep at night??‍♀️ Or do I need to teach him a regime myself? I just can't imagine ??‍♀️