Care for mixed race hair

Hello, first time mum here and I’m trying my best to give the right care and treatment to my baby’s hair he is 7 months old almost 8 months and the texture of his hair is changing and the type of curl he has also they are going tighter and like Afro style hair. I just want to look after it properly and correctly and want to know what are the best products to do this? And how often I should be washing and treating his hair? He also has a bald patch at the back and a little straight bit underneath that is there anything that can help with the little bald patch? And will the straight patch fall out and replace with curls or will this stay the same? So sorry for the amount of questions I just want to make sure I’m giving the correct care to my baby’s hair! Thank you for your help :) x