how often to feed a newborn?

ais • 21, ftm, boy mom 🤍

i’m formula feeding, my baby is 2 weeks and 4 days. i was told every 2/3 hours but wake baby if past 4 hours. i’m feeding him every 2 hours and at night sometimes me waking him (majority time) and sometimes him waking me. should i just let him wake me up? or continue waking him every 2 hours? it’s killing me having no sleep, would you feed your newborn on demand or would you wake them to feed?