How Can I Start Being A Fashion And Beauty Girl?

I’m 13 and I love fashion and beauty, but I just don’t know how to be a fashionista/ fashion and beauty girl! I’m doing this for myself, by the way! What magazines do I read, make -up, any recommended stores, clothing lines, clothes, shoes, accessories, purses (I already have a small Coach Purse), what do fashionistas obsess over (except for fashion and beauty duh!), how do they act, any recommended books (fiction or nonfiction), what do they say a lot, what celebrities are their role models, how do I get great fashionista-baby soft skin, any bedroom (bathroom) make-overs, and any other suggestions are cool! I don’t want to be self-centered or mean, I am really nice actually.
Sorry, that’s a lot of stuff, but I just love fashion, just don’t know how to put it!
Advice would be awesome!