How to take care of biracial hair?

I'm not sure who to ask, but I'm not really sure how to take care of my hair? I'm half black and half white. My mom is white and she just kind of washed my hair and put it in a pony tail my whole life. My dad is black, but knows NOTHING about taking care of hair (he shaves). I've always kind of washed it every other day, but it is constantly dry. I don't use any "product" nor do I get my hair done. I shaved it all off 2 years ago, and it's now grown into a big, beautiful afro. I'm just looking for suggestions on what to do? Should I be putting something in my hair? How much am I actually supposed to wash it? Does the brush I use matter? I looked stuff up on YouTube, but I don't understand anything.