how to bathe

My baby is 2 months old and I just recently started bathing him ( my MIL would bathe him) and I have a questions regarding his soft bones. When I put shampoo on his head I tend to avoid his soft bones anyone else? I mean I wash the frontal area but not as much as the rest of his head. But after I bathe him I see white flakes on his scalp. Not sure if it's good or not. I never asked his pediatrician.