I believe the guideline is don't let them sleep longer than 3 hours between feedings until they reach their birth weight. After that, I believe it's baby led. Our LO is almost 3 weeks old and rarely goes longer than 3 hours without waking himself up to let us know it's time to eat. Sometimes he'll only go 2 hours. Last night he went about 4 hours before he woke up to eat. He's healthy, so I let him tell me when he's hungry.
This is us, exactly, only we were told no longer than four hours between feedings. But she usually wakes up after about three, anyway.
We aren't bothering with schedules yet. DD is almost three weeks and just went through her two week growth spurt. If we'd been on a schedule this early, it would've been completely shot to helI because she was eating every 45 min to an hour. All her feedings now are led by her. I try to anticipate bedtime at night and feed her before she cues to kind of get her in the mood for sleep. Last night it worked great. But on the nights she cluster feeds, forget it. No amount of anticipatory feeds will help with that!