[Help Please!] Feed on demand or follow baby schedule?

My girl is 1 month old. She is 5kg and drinks FM 110ml currently. Every 2 to 3 hours. Confinement nanny says we must feed her on schedule(every 3 hours) so we don't over feed her. But the thing is she cries and fusses every 1 and a half to 2 hours demanding to be fed. Should I increase the volume of FM or just follow nanny advice and let my baby wait for 3 hours to be fed? Baby is growing , pooping every 2 to 3 days. Please help me. I am at my wit's end as I am a FTM and find it hard to soothe baby. 😔 #advicepls #firsttimemom #pleasehelp