Need advice on raising my 8 year old sister.

I just got temporary custody of my siblings(14yr brother, 11 yr brother, and 8 yr sister,) because my mother is back in jail for drug problems. My brothers I feel like I know what they need and how to talk about things, but I feel so uncomfortable with my sister. I love her to death, but I haven't really seen her since I moved out 2 years ago. She was going into kindergarten basically when I was leaving for college. I have been no contact with my mom since, but keep in touch with my 14 year old brother, and helped all of them when I could through him. My mom is going to be in jail for around 3-5 years this time, so I want to get permanent custody. We are going to have a lot of struggles as I am just in my second year of college, but we are going to do our best to stick together. What I have no clue know how to do is help her with her hair, or other girl things. Any single dads have advice for raising a girl without the mom around? Any idea what I should do here just in general to make sure she feels loved and safe? To her I am kind of a stranger. It's been a little awkward and uncomfortable. When she was little she just wanted to ride on my shoulders all the time. When I asked her if she wanted to do that today, she gave me the death glare. :D via /r/Parenting http://bit.ly/2BcB1D0