My 4-month old baby shouts too loud now. It sounds funny and entertaining to us. Is she learning to talk now or just need some attention?

My baby boy started shouting at 4 months old too. He will shout with high pitch. It's really funny. I knew he was experimenting with his voice. But I was afraid that he may learn to shout to get the things he wants in when he grows up. Hence, every time he shouts, I will say "no, no, no, no shouting". He is not 5 months and he has stop shouting too. He will make funny noise that seems like he's singing but not shouting