Can someone please help this green eyed, brown haired white girl figure out what to do with her son's hair???

Jeremiah is biracial and has loose African American curls. My trouble is that I can't get through his hair after I wash and condition it without pulling and hurting him. I understand that the texture of his hair is way different than my own and is dry so it requires special products. I only wash his hair once a week (bathe more often) and use an olive oil shampoo. I have tried Pantene conditioner but that is useless for his kind of hair. I have tried something called Frizz upon the recommendation of a salon. Then there's a leave in styling cream/conditioner. It works better than the Pantene but runs $25.00 a bottle which isn't really in my budget for infant hair care.

I have tried a wide tooth comb, a pick and a detangler comb. I hate that it's such an event to get through his hair. Any suggestions would be appreciated!!!

Can anyone help? Please???

Michelle