2 months old milestones

Isabella

Ok so I’m a first time mom, and I have a baby boy named Kingston who’s 9 weeks and 5 days old. I’ve noticed by now baby’s are usually lifting their heads while on their tummy , I noticed that baby’s usually turn their heads to sounds by this time, and a few other things... he’s not doing any of that. I need advice and tips on how to get him to start progressing , what things should I be doing with him??