Curly hair

I have curly hair, like 3A after I shower and 2C once it gets dirty/oily. I'm Caucasian and my hair is slightly damaged from straightening and sun lightened. Are there any products I can use to enhance my curls and naturally reduce frizz? I never brush it except right before I shower and I use herbal essence shampoo and conditioner. And frizz ease leave in conditioner sometimes.