How long naps should a two month old take?

I'm sorting his sleeping routine out today I'm determined he's being sleeping 7-8 hours during the day (without feeding doctor okayed it) so I need to get that 7-8 hours sleep to night time starting at like 11 pm ish...how long do you think I should let him nap ? He has 2 hour and half an hour ones at night should I wake him up after 2 hours?