How long to let a 2 month old nap during the day?

Kristina • mommy to 3 healthy boys. Hunter 5.7.13, Eli 7.29.18 and Jenson 6.28.20

Once my son eats and falls asleep he’ll sleep 4+ hours if I let him but he won’t sleep at night he’ll fight me. Also tips on how and when to start a schedule with him. Kinda have one now just not set in stone. Also any tips how to help him sleep better at night are much appreciated. TIA

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