When did your baby learn to use their hands? Shake a rattle, grab things, etc

It’s the last day of leap 3 and my baby is 14 weeks today (was born 12 days early) and I’m sitting here wondering why he hasn’t shaken a rattle or successfully grabbed anything yet? He also has no interest in tummy time and wont lift his head unless on a boppy with a video in front of him and even then he starts crying after about a 30-60 sec. He’s responsive to noise and is very vocal, also holds his head well while upright. I’ve just been waiting for him to finally grab things and he doesn’t, sometimes it seems like he tries to reach. He also downs want to roll bc he hates being on his belly but has fun when i roll him myself.