Sleeping and activities

My babygirl is 15 weeks. I was wondering a few things.

-How long does your LO stay up between naps!? She’s about an hour and half two hours.

-What time are they usually asleep at night? And how long? Bedtime tends to start around 7-730 and sleep by 8-830 pending on the day.

-What does your night time sleep look like? She tends to take up between 12-3 to nurse and 5-6 to nurse and usually goes back to sleep for an hour or so.

Also- she basically nurses one side during the day and at night she empties both loke she gets a super fully belly to sleep longer.

Does this all sound okay?

Also, what activities do you do with your LO at this age? We do yummy time, read books, hold and play with toys.. i feel like there’s more we could be doing.