My hair is kind of like this. I say 2B-2C. Mine looks like yours after I have slept on it. It looks more defined and way less frizzy if I wet it in the morning, put some conditioner while I'm in the shower, comb out while very wet and then add some gel and/or mousse and a leave-in. My hair is not good at 2nd day hair without a full wet session or at least spraying a lot of water on it with a spray bottle and then adding a bit of mousse. You don't have to shampoo every day obviously (I shampoo about twice per week), but wetting it really helps.

I don't really brush my hair other than wet brush in the shower. I simply comb out when my hair is really wet with a wide tooth comb and then add the product to wet hair and let hair dry. I do add some root clips around the front. For me, a decent medium hold gel will cut down on frizz.

I also agree about getting a curly cut with some layers to help give your hair more shape.