Baby screaming is not always a bad thing. you can’t give in and pick them up every time they scream sometimes you let scream for 5-10 minutes. You eventually will know what is fake crying and real crying/screaming. My kid would start slow, intermediate cries which I knew were fake and the loud and consistent crying was when I picked up my daughter and picked her up to calm her down.
Health babies cry for food, wet diaper or crankiness. I had my daughter on schedule about around 3 months so I knew if it was time for food or nap time ( she slept twice a day).
I tried not to change that schedule because come weekends and you things change you will have a cranky baby. Remember a happy sleeps and eats and does some tummy time and that is all they do for first 6 months.