whatever you do don't let infant get so sleepy they try to nap autonomously give them naps on playmat etc while they're still half energy things be much easier
also whenever infant snooze or has full needs immediately fill your other sims needs even if they're still relatively high
if all needs are red for your infant fill energy first then feed then wait for poopoo and bathe
when super hungry don't even bother with highchair just bottle feed them
anyway what i was trying to say was don't let infant go on red they'll try to autonomously beg for things and then all sims are just going to get all tangled in their interactions