Out of hospital feeding newborn!

Should I just be constantly feeding on demand? I feel like I should and she’s not over eating because she doesn’t spit up or throw up hardly at all during the day. She’s 2 days old now and I was told to feed 10-15ml at hospital and we went home giving around 20ml-25ml every 2hours or so… now she’s sometimes wanting milk sooner than 2 hour time frame or wanting more than 25ml after 2hours… I know it’s not fussy ness from anything else because she’s bitting and sucking ay her hands and mouth open wide for bottle frustratingly crying.. let me know what you think or how much ur newborn are leaving hospital/within first week ect.