What am I supposed to wear?

I've been watching stars on tv and seeing their outfits and wanting to make outfits just like their's. i really like outfits from stars like selena gomez, bridget mendler, and victoria justice. My everyday outift would usually be like a shirt, converse, and a pair of jeans but that's nothing compared to their outfits. my mom made it officially clear that she has no problem with me wearing makeup (as long as it looks natural), heels or heeled boots (boots for fall and heels for summer), and shorts and short skirts and dresses(as long as I have something underneath). Now back to my question..... I'm going back home to germany this summer and will be staying with people I know. I really want this year to be better and now that I'm officially a teenager and back home I want a new me. not the boring dull me I was before. My question basically is what are a few things I could do to make my outfits more interesting. Please dont say anything as in go to stores right away, i cant because of personal reasons. ideas how to make new clothes out of old ones would be great! also, I need help with hair! I am naturally frizzy-curly but I like to straighten my hair. But RIGHT NOW my hair looks like a jungle in Brazil ! helpppppppp ! thanks , it's appreciated xo - <3 !!