Usually when she wakes up, If she’s happy I leave her as she’s still resting and she’ll let me know when she’s ready to get up
I wouldn't worry about timing the wake window exactly. You know roughly when he was awake so follow sleepy cues for the nap time. I've never kept track of wake windows just have a general idea when he woke.....ISH 😂
I usually just hear him or if he’s woken up first it’s not for long before I wake up. His wake windows vary anyway so I just monitor how he is. If he’s happy in his crib amusing himself I think that’s a good thing :)