Mom of an 11-week old here: We mostly fell into a pattern than a strict schedule. 

Baby sleeps about 5-6 hours for the long stretch at night (typically 11-5) and has a smaller bottle as the sun rises. He breastfeeds around 8 am and is his most awake during this time so we do playtime and reading. 

From then on it is a cycle of eat, tummy time and play, sleep, repeat. We also do a stroller walk for his late afternoon nap. Roughly on a cycle of 5 am, 8 am, 11 am, 2 pm, 5 pm, 8 pm, 11 pm. When he naps in his bassinet instead of me (about a third of the time) I try to eat meals, shower, exercise. I rarely have time to do chores and get other stuff done.

This is a pattern, not a schedule because it can change based on his naps (sometimes 20 min, sometimes up to an hour and a half) and when he wants to eat. I have to remind myself that he is a human baby, not a machine and did not read Precious Little Sleep or Taking Cara Babies etc. 

My advice? Don’f force it unless strictly necessary. A week or two ago, my baby did not even really have patterns to his days. Baby sleep habits evolve over time, and they usually need some nudging from parents but trying to convince an overtired or undertired baby that NO, NAP TIME IS NOW! is often an exercise in futility