Yes completely normal it’s called the palmar grasp reflex it should lessen as time goes on and he should unball them when he’s full from feeding I wouldn’t think too much about this.
Totally normal. Make sure you clean their hands really good every day or they get gross
Yes! Totally normal. I remember reading an article about it when my son was a newborn that said babies normally ball up their fists a lot and will sometimes unball them when they are full. Which makes sense to me since they’re hungry all the time