Instead of getting him to sleep at certain times.... go by his cues.
He is only 9 weeks old. They do not have real set patterns of sleep yet. Not like an older child.
Newborns/babies, nap a lot and also sleep.
After being awake for about 2 hours or so, they get tired again and need a nap. For example.
And if over tired or over stimulated, they cannot sleep well and may wake more.
Don't wake him up in the morning. Let him sleep until he wakes on his own in the morning.
And a baby will not be on the same schedule as a 2 year old.
9 weeks is also a growth spurt period in a newborn. Every 3 weeks is a growth spurt. Then at 3 months, 6 months, 9 months and so forth.
And at growth spurts, they need more intake/feedings and more often. Don't "schedule" baby's feedings. Feed/nurse, on-demand. Or a baby will not be getting what they need to keep up with them and their growth.
Often also, a baby/newborn "cluster feeds." Which means they also will need to feed every single hour. And if you feed on-demand, then, baby will get more ideal intake.
My kids as babies, napped about 3 times a day. Woke. And I nursed them and nursed them on demand. Which would occur at 1 or 2 or 3 hours at most. I went by THEIR cues for hunger and sleep.
They woke, nursed, woke, nursed, woke, nursed, woke, nursed etc. Day and night. And varying intervals.