Baby 1 month

Hello mummies, my baby dah masuk 1 month.. I just nak Tanya.. usually baby kena menyusu every 2 or 3 hours .. my question is , let say I feed my baby jam 9am, tp lepas tu dia tidur 10.30am.. which one should I ikut ..meaning should I kira dari jam 9am, lepas 2 or 3 hour baru wake him up, or should I ikut time dia tidur which is 10.30 am..