i need help with how to take care of my hair...what technique should i use for washing, conditioning

I think I have 3b/3c hair and I really am struggling to find a routine. Currently I use Shea moisture shampoo, conditioner, and leave in conditioner. I'm trying to figure out what routine I need to do in between shampoos. I want to find a product I can put in my hair and when to deep condition and with what... my hair is so dry and brittle and I braid it at night but when I wake up it's even more dry and breaks off....HELP